Accton Technology Switch VM2524 User Manual

VDSL Switch-VS2512A  
VDSL Splitter-VM2524  
VDSL Splitter-VM2548  
Installation Guide  
 
Installation Guide  
VDSL Switch-VS2512A  
VDSL Switch supporting 12 VDSL Lines, with 1 Slot for Optional Gigabit  
Uplink, 10/100BASE-TX, or 100BASE-FX Modules  
VDSL Splitter-VM2524  
VDSL Splitter supporting 24 VDSL Lines  
VDSL Splitter-VM2548  
VDSL Splitter supporting 48 VDSL Lines  
 
Copyright © 2002 by Accton Technology Corporation. All rights reserved.  
No part of this document may be copied or reproduced in any form or by any means without the prior written  
consent of Accton Technology Corporation.  
Accton makes no warranties with respect to this documentation and disclaims any implied warranties of  
merchantability, quality, or fitness for any particular purpose. The information in this document is subject to  
change without notice. Accton reserves the right to make revisions to this publication without obligation to  
notify any person or entity of any such changes.  
International Headquarters  
No. 1 Creation Road III,  
Science-based Industrial Park  
Hsinchu 300, Taiwan  
Europe Headquarters  
Edificio Conata II,  
Calle Fructuós Gelabert 6-8, 2o, 4a,  
08970 - Sant Joan Despí,  
Barcelona, Spain.  
Phone: +886-3-5770-270  
Fax:  
+886-3-5770-267  
Phone: +34-93-477-4920  
Internet: [email protected]  
Fax:  
+34-93-477-3774  
Asia Pacific Headquarters  
1 Claymore Drive  
#08-05/06 Orchard Towers (Rear Block)  
Singapore 229594  
Phone: +65 238 6556  
Fax:  
+65 238 6466  
Accton is a trademark of Accton Technology Corporation. Other trademarks or brand names mentioned  
herein are trademarks or registered trademarks of their respective companies.  
VS2512A  
VM2524  
VM2548  
E072002-R01  
150000010100A  
 
Accton Technology Corporation  
Limited Warranty: Accton warrants all its products to be free of manufacturing defects in  
workmanship and materials, under normal use and service, for the applicable warranty  
term. All Accton products carry a standard 90-day limited warranty from the date of  
purchase from Accton or its Authorized Reseller. Accton may, at its own discretion, repair  
or replace any product not operating as warranted with a similar or functionally equivalent  
product, during the applicable warranty term.  
The standard limited warranty can be upgraded to a Limited Lifetime* warranty by  
registering new products within 30 days of purchase from Accton or its Authorized  
Reseller. Registration can be accomplished via the enclosed product registration card or  
online via the Accton web site. Failure to register will not affect the standard limited  
warranty. The Limited Lifetime warranty covers a product during the Life of that Product,  
which is defined as the period of time during which the product is an “Active” Accton  
product. A product is considered to be “Active” while it is listed on the current Accton price  
list. As new technologies emerge, older technologies become obsolete and Accton will, at  
its discretion, replace an older product in its product line with one that incorporates these  
newer technologies. At that point, the obsolete product is discontinued and is no longer  
an “Active” Accton product. A list of discontinued products is attached with the most  
recent version being available on the support section of our web site  
All products that are replaced become the property of Accton. Replacement products may  
be either new or reconditioned. Any replaced or repaired product carries either a 30-day  
limited warranty or the remainder of the initial warranty, whichever is longer. Accton is not  
responsible for any custom software or firmware, configuration information, or memory  
data of Customer contained in, stored on, or integrated with any products returned to  
Accton pursuant to any warranty. Products returned to Accton should have any  
customer-installed accessory or add-on components, such as expansion modules,  
removed prior to returning the product for replacement. Accton is not responsible for  
these items if they are returned with the product.  
Customers must contact Accton for a Return Material Authorization number prior to  
returning any product to Accton. Proof of purchase may be required. Any product  
returned to Accton without a valid Return Material Authorization (RMA) number clearly  
marked on the outside of the package will be returned to customer at customer’s  
expense. Customers are responsible for all shipping charges from their facility to Accton.  
Accton is responsible for return shipping charges from Accton to customer.  
 
Limited Warranty  
WARRANTIES EXCLUSIVE: IF AN ACCTON PRODUCT DOES NOT OPERATE AS  
WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY SHALL BE REPAIR OR  
REPLACEMENT OF THE PRODUCT IN QUESTION, AT ACCTON’S OPTION. THE  
FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF  
ALL OTHER. WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, EITHER IN  
FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING  
WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND FITNESS FOR A  
PARTICULAR PURPOSE. ACCTON NEITHER ASSUMES NOR AUTHORIZES ANY  
OTHER PERSON TO ASSUME FOR IT ANY OTHER LIABILITY IN CONNECTION  
WITH THE SALE, INSTALLATION, MAINTENANCE OR USE OF ITS PRODUCTS.  
ACCTON SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND  
EXAMINATION DISCLOSE THE ALLEGED DEFECT IN THE PRODUCT DOES NOT  
EXIST OR WAS CAUSED BY CUSTOMER'S OR ANY THIRD PERSON'S MISUSE,  
NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS  
TO REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED  
USE, OR BY ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.  
LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT OR  
TORT (INCLUDING NEGLIGENCE), SHALL ACCTON BE LIABLE FOR INCIDENTAL,  
CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE DAMAGES OF ANY KIND, OR  
FOR LOSS OF REVENUE, LOSS OF BUSINESS, OR OTHER FINANCIAL LOSS  
ARISING OUT OF OR IN CONNECTION WITH THE SALE, INSTALLATION,  
MAINTENANCE, USE, PERFORMANCE, FAILURE, OR INTERRUPTION OF ITS  
PRODUCTS, EVEN IF ACCTON OR ITS AUTHORIZED RESELLER HAS BEEN  
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  
SOME COUNTRIES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES  
OR THE LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR  
CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS AND EXCLUSIONS MAY  
NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS,  
WHICH MAY VARY FROM STATE TO STATE. NOTHING IN THIS WARRANTY SHALL  
BE TAKEN TO AFFECT YOUR STATUTORY RIGHTS.  
* Accton will provide warranty service for up to three years following discontinuance from  
the active Accton price list. Under the limited lifetime warranty, internal and external  
power supplies, fans, and cables are covered by a standard one-year warranty from date  
of purchase  
 
Compliances  
FCC - Class A  
This equipment generates, uses, and can radiate radio frequency energy and, if not  
installed and used in accordance with the instruction manual, may cause interference to  
radio communications. It has been tested and found to comply with the limits for a Class A  
computing device pursuant to Subpart B of Part 15 of FCC Rules, which are designed to  
provide reasonable protection against such interference when operated in a commercial  
environment. Operation of this equipment in a residential area is likely to cause  
interference, in which case the user, at his own expense, will be required to take whatever  
measures may be required to correct the interference. You are cautioned that changes or  
modifications not expressly approved by the party responsible for compliance could void  
your authority to operate the equipment.  
You may use unshielded twisted-pair (UTP) for RJ-45 connections - Category 3 or greater  
for 10 Mbps connections, and Category 5 for 100 Mbps connections. For fiber optic  
connections, you may use 50/125 or 62.5/125 micron multimode fiber or 9/125 micron  
single-mode fiber.  
Warnings: 1. Wear an anti-static wrist strap or take other suitable measures to prevent  
electrostatic discharge when handling this equipment.  
2. When connecting this hub to a power outlet, connect the field ground lead  
on the tri-pole power plug to a valid earth ground line to prevent electrical  
hazards.  
Industry Canada - Class A  
This digital apparatus does not exceed the Class A limits for radio noise emissions from  
digital apparatus as set out in the interference-causing equipment standard entitled  
“Digital Apparatus,” ICES-003 of the Department of Communications.  
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux  
appareils numériques de Classe A prescrites dans la norme sur le matériel brouilleur:  
“Appareils Numériques,” NMB-003 édictée par le ministère des Communications.  
Japan VCCI Class A  
i
 
CE Mark Declaration of Conformance for EMI and Safety (EEC)  
This information technology equipment complies with the requirements of the Council  
Directive 89/336/EEC on the Approximation of the laws of the Member States relating to  
Electromagnetic Compatibility and 73/23/EEC for electrical equipment used within certain  
voltage limits and the Amendment Directive 93/68/EEC. For the evaluation of the  
compliance with these Directives, the following standards were applied:  
RFI Emission:  
Limit class A according to EN 55022:1998  
Limit class A for harmonic current emission according to EN 61000-3-2/1995  
Limitation of voltage fluctuation and flicker in low-voltage supply system  
according to EN 61000-3-3/1995  
Immunity:  
Product family standard according to EN 55024:1998  
Electrostatic Discharge according to EN 61000-4-2:1995  
(Contact Discharge: ±4 kV, Air Discharge: ±8 kV)  
Radio-frequency electromagnetic field according to EN 61000-4-3:1996  
(80 - 1000 MHz with 1 kHz AM 80% Modulation: 3 V/m)  
Electrical fast transient/burst according to EN 61000-4-4:1995 (AC/DC power  
supply: ±1 kV, Data/Signal lines: ±0.5 kV)  
Surge immunity test according to EN 61000-4-5:1995  
(AC/DC Line to Line: ±1 kV, AC/DC Line to Earth: ±2 kV)  
Immunity to conducted disturbances, Induced by radio-frequency fields:  
EN 61000-4-6:1996 (0.15 - 80 MHz with 1 kHz AM 80% Modulation: 3 V/m)  
Power frequency magnetic field immunity test according to  
EN 61000-4-8:1993  
(1 A/m at frequency 50 Hz)  
Voltage dips, short interruptions and voltage variations immunity test  
according to EN 61000-4-11:1994 (>95% Reduction @10 ms, 30%  
Reduction @500 ms, >95% Reduction @5000 ms)  
LVD:  
EN 60950 (A1/1992; A2/1993; A3/1993; A4/1995; A11/1997)  
Warning! Do not plug a phone jack connector in the RJ-45 port. This may damage this  
device. Les raccordeurs ne sont pas utilisé pour le système téléphonique!  
Taiwan BSMI Class A  
ii  
 
Safety Compliance  
Warning: Fiber Optic Port Safety  
When using a fiber optic port, never look at the transmit laser while it is  
powered on. Also, never look directly at the fiber TX port and fiber cable  
ends when they are powered on.  
CLASS I  
LASER DEVICE  
Avertissment: Ports pour fibres optiques - sécurité sur le plan optique  
Ne regardez jamais le laser tant qu'il est sous tension. Ne regardez  
jamais directement le port TX (Transmission) à fibres optiques et les  
embouts de câbles à fibres optiques tant qu'ils sont sous tension.  
DISPOSITIF LASER  
DE CLASSE I  
Warnhinweis: Faseroptikanschlüsse - Optische Sicherheit  
Niemals ein Übertragungslaser betrachten, während dieses  
eingeschaltet ist. Niemals direkt auf den Faser-TX-Anschluß  
und auf die Faserkabelenden schauen, während diese  
LASERGERÄT  
DER KLASSE I  
eingeschaltet sind.  
Underwriters Laboratories Compliance Statement  
Important! Before making connections, make sure you have the correct cord set. Check  
it (read the label on the cable) against the following:  
Operating Voltage  
120 Volts  
Cord Set Specifications  
UL Listed/CSA Certified Cord Set  
Minimum 18 AWG  
Type SVT or SJT three conductor cord  
Maximum length of 15 feet  
Parallel blade, grounding type attachment plug rated 15 A, 125 V  
Cord Set with H05VV-F cord having three conductors with  
240 Volts (Europe only)  
2
minimum diameter of 0.75 mm  
IEC-320 receptacle  
Male plug rated 10 A, 250 V  
The unit automatically matches the connected input voltage. Therefore, no additional  
adjustments are necessary when connecting it to any input voltage within the range  
marked on the rear panel.  
iii  
 
Wichtige Sicherheitshinweise (Germany)  
1. Bitte lesen Sie diese Hinweise sorgfältig durch.  
2. Heben Sie diese Anleitung für den späteren Gebrauch auf.  
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Verwenden Sie keine  
Flüssigoder Aerosolreiniger. Am besten eignet sich ein angefeuchtetes Tuch zur  
Reinigung.  
4. Die Netzanschlu ßsteckdose soll nahe dem Gerät angebracht und leicht zugänglich sein.  
5. Das Gerät ist vor Feuchtigkeit zu schützen.  
6. Bei der Aufstellung des Gerätes ist auf sicheren Stand zu achten. Ein Kippen oder Fallen  
könnte Beschädigungen hervorrufen.  
7. Die Belüftungsöffnungen dienen der Luftzirkulation, die das Gerät vor Überhitzung schützt.  
Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.  
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.  
9. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollte auch  
nichts auf der Leitung abgestellt werden.  
10. Alle Hinweise und Warnungen, die sich am Gerät befinden, sind zu beachten.  
11. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetz  
trennen. Somit wird im Falle einer Überspannung eine Beschädigung vermieden.  
12. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das Gerät  
gelangen. Dies könnte einen Brand bzw. elektrischen Schlag auslösen.  
13. Öffnen sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen Sicherheit nur  
von authorisiertem Servicepersonal geöffnet werden.  
14. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von einer  
qualifizierten Servicestelle zu überprüfen:  
a. Netzkabel oder Netzstecker sind beschädigt.  
b. Flüssigkeit ist in das Gerät eingedrungen.  
c. Das Gerät war Feuchtigkeit ausgesetzt.  
d. Wenn das Gerät nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit  
Hilfe dieser Anleitung keine Verbesserung erzielen.  
e. Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.  
f. Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.  
15. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden. Für einen  
Nennstrom bis 6A und einem Gerätegewicht größer 3 kg ist eine Leitung nicht leichter als  
H05VV-F, 3G, 0.75 mm2 einzusetzen.  
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 beträgt 70 dB(A) oder  
weniger.  
iv  
 
Chapter 1: About the VDSL Switch-VS2512A  
Overview  
Accton’s Ethernet-over-VDSL system consists of end-user CPEs (Customer  
Premise Equipment) connected to a VDSL switch and splitter by standard telephone  
cable. The VDSL connection delivers an Ethernet data link rated up to  
15 Mbps symmetric (full duplex), while simultaneously supporting standard  
telephone services. The system can be deployed in any multi-dwelling/multi-tenant  
environment (apartment blocks, hotels, or office complex) to provide both high-  
speed Internet access and telephone services without any need for re-wiring.  
Accton’s VDSL Switch-VS2512A and VDSL-Splitter-VM2524/VM2548 combine both  
the data and phone signals coming from your Internet and telephone service  
providers, and pass these signals directly over standard telephone wiring to multiple  
users in the same building. A CPE is then used to separate these signals and pass  
them on to a customer’s computer and telephone equipment. In-building  
connections can operate up to 15 Mbps for runs up to 1070 m (3500 ft), 10 Mbps for  
runs up to 1220 m (4000 ft), 5 Mbps for runs up to 1525 m (5000 ft).  
Note: Category 3 cable must be installed to achieve the maximum distance, but the  
distance may be limited by factors such as how the cable is bundled, and the  
interference and noise on the link.  
The VDSL switch and splitter are typically located in a wiring closet or other central  
location of a multi-dwelling/multi-tenant unit, campus or enterprise. An Internet  
connection is provided from the ISP to the customer’s building over fiber optic cable,  
running Ethernet directly over a 100 Mbps or 1 Gbps connection. This kind of WAN  
connection is referred to as Fiber To The Building (FTTB). Phone signals are routed  
from PBX/MDF distribution equipment into the splitter. The data and phone signals  
for each user are combined in the splitter, and passed over VDSL lines to individual  
customers.  
The CPE at the other end of the VDSL line connects to any PC or Macintosh  
equipped with a 10/100BASE-TX network interface card. Your existing telephone,  
modem, or fax machine simply plugs into the CPE’s phone port. There is no need for  
special splitters, terminators or filters. In fact, there is no need to modify the home  
wiring at all. And, because the VDSL connection is based on Ethernet, no further  
complex software configuration is required.  
1-1  
 
   
About the VDSL Switch-VS2512A  
VDSL Technology  
VDSL (Very High Bit-Rate Digital Subscriber Line) is at the high-end of all the DSL  
technologies, offering the best combination of fiber optics and copper to provide  
high-speed broadband Internet access. VDSL’s primary application is in providing a  
broadband data service to multi-tenant residential or commercial buildings. In this  
implementation, fiber optic cable carries data from an Internet Service Provider to  
the building; then the installed telephone copper wires take the data and deliver it to  
individual units within that building.  
Telephone  
Rooms/Clients  
ES2002-TS  
VDSL CPE  
Floor 2  
Telephone/Fax  
Rooms/Clients  
ES2002-TS  
VDSL CPE  
Existing Phone  
Lines to Clients  
Floor 1  
Local Servers  
(Locally Hosted Services,  
Video Servers, Billing)  
VDSL  
Switch-VS2512A  
VDSL  
Splitter-VM2524  
Punch Down  
Blocks /  
Patch Panels  
t
c
h
V
S
V
D
S
L
S
w
i
-
0
-
6
0
H
z
1
A
100-240V  
~
5
E
t
h
e
r
n
e
t
4
Stackingn  
Diaga  
Powwer  
Reset  
Console  
V
S
2
5
1
2
A
1
2
3
V
6
D
S
L
7
8
9
10  
1
1
12  
Activity  
 v
ty  
5
Linkn  
/Speed  
1
2
3
4
Activity  
 v
ty  
Stackingn  
Onf  
O
Link  
ISP  
Master  
M
o
d
u
l
e
Down  
E
x
p
a
n
s
i
o
n
Up  
d
e
M
Module  
o
d
u
l
e
100BASE-F  
0BASE-FX Singlemo  
S
i
n
g
l
e
m
o
JS  
V
S
p
l
t
e
r
-
VVMM225522  
4
V
D
S
L
t
V
M
2
5
2
(Internet)  
L
i
n
e
Fiber Optic Link to ISP  
Phone Lines  
VDSL Lines  
PBX  
Central Office  
(PSTN)  
Telephone Line from Central Office  
Multi-dwelling/Multi-tenant Building  
Figure 1-1. VDSL Application  
VDSL provides high-speed Internet access over existing phone lines by making use  
of previously unused frequency bandwidth above the voice band. By placing VDSL  
signals above the frequency of the voice signal, a VDSL service can coexist on the  
same line as other telephone services. VDSL can operate symmetrically, providing  
the same data rate in both directions, or asymmetrically, providing a higher data rate  
in the downstream (receive) direction than in the upstream (transmit) direction.  
VDSL can deliver high-performance online applications, such as high-quality video  
and other switched multimedia services. Accton's Ethernet-over-VDSL system  
provides robust performance, with a symmetric data rate up to 15 Mbps, and a range  
up to 1525 m (5000 ft). Accton’s system is based on advanced VDSL QAM  
(Quadrature Amplitude Modulation) technology with adaptive channel equalization  
that overcomes bridge taps and other line distortions. Reed-Solomon Forward Error  
Correction and interleaving protects against errors due to impulse noise and enables  
recovery from signal interruptions. Frequency Division Duplexing (FDD) separates  
downstream and upstream channels and allows VDSL signals to coexist with regular  
telephone services. A power back-off mechanism is also implemented to reduce  
noise from crosstalk in line bundles.  
1-2  
 
   
Overview  
Switch Architecture  
The VDSL Switch-VS2512A employs a wire-speed, non-blocking switching fabric.  
This permits simultaneous wire-speed transport of multiple packets at low latency on  
all ports. This switch also features full-duplex capability on all ports, which effectively  
doubles the bandwidth of each connection.  
Management Options  
This switch contains a comprehensive array of LEDs for “at-a-glance” monitoring of  
network and port status. It also includes a built-in network management agent that  
allows the switch to be managed in-band using SNMP or RMON (Groups 1, 2, 3 and  
9) protocols, with a Web browser, or remotely via Telnet. The switch also provides an  
RS-232 serial port (DB-9 connector) on the front panel for out-of-band management.  
A PC may be connected to this port for configuration and monitoring out-of-band via a  
null-modem cable. (See Appendix B for wiring options.)  
This switch provides a wide range of advanced performance-enhancing features.  
Port-based and tagged VLANs, plus support for automatic GVRP VLAN registration  
provides traffic security and efficient use of network bandwidth. QoS priority  
queueing ensures the minimum delay for moving real-time multimedia data across  
the network. Flow control eliminates the loss of packets due to bottlenecks caused  
by port saturation. Broadcast storm control prevents broadcast traffic storms from  
engulfing the network. Some of this switch’s advanced features are described below.  
For a detailed description, refer to the Management Guide.  
VLANs  
The VDSL Switch-VS2512A supports up to 255 VLANs. A Virtual LAN is a collection  
of network nodes that share the same collision domain regardless of their physical  
location or connection point in the network. By segmenting your network into  
VLANs, you can:  
• Eliminate broadcast storms which severely degrade performance in a flat network.  
• Simplify network management for node changes/moves by remotely configuring  
VLAN membership for any port, rather than having to manually change the node’s  
IP address.  
Multicast Switching  
Specific multicast traffic can be assigned to its own VLAN to ensure that it does not  
interfere with normal network traffic and to guarantee real-time delivery by setting  
the required priority level for the designated VLAN. The switch uses IGMP Snooping  
to manage multicast group registration.  
1-3  
 
                             
About the VDSL Switch-VS2512A  
Traffic Priority  
This switch provides Quality of Service (QoS) by prioritizing each packet based on  
the required level of service, using four distinct categories with Weighted Round  
Robin Queuing. It uses IEEE 802.1p and 802.1Q tags to prioritize incoming traffic  
based on input from the end-station application. These functions can be used to  
provide independent priorities for delay-sensitive data and best-effort data.  
Description of Hardware  
VDSL Switch-VS2512A  
Accton’s VDSL Switch-VS2512A together with the VDSL Splitter-VM2524/VM2548  
combines data and voice signals for delivery over standard telephone cable to  
multiple users in residential or commercial buildings. Ethernet data signals are  
received on the switch uplink port and passed to 12 VDSL lines via 12 internal  
Ethernet ports. These 12 VDSL lines are then passed to the splitter via the RJ-21  
connector on the rear panel.  
The switch supports the following optional modules: 1-port 1000BASE-T, 1-port  
1000BASE-SX, 1-port 1000BASE-LX, 1-port 1000BASE-X GBIC, 4-port  
100BASE-FX multimode and single-mode, 1-port 100BASE-FX mutimode, 1-port  
10/100BASE-TX, or 4-port 10/100Base-TX. The fiber module ports can provide  
direct connection to your ISP with fiber optic cable. In a switch stack, any of the  
module ports can also function as uplinks to the backbone, or as regular switch ports  
for networking.  
Speed, duplex mode, and flow control for the optional module, and GBIC transceiver  
ports are shown below.  
Port Type  
Speed  
Duplex Mode  
full duplex  
auto  
Flow Control  
auto  
100BASE-FX  
10/100BASE-TX  
1000BASE-T  
100 Mbps  
auto (10/100 Mbps)  
auto  
auto (10/100/1000 Mbps) full duplex at 1000 Mbps  
full/half duplex at 10/100 Mbps  
auto  
1000BASE-SX  
1000BASE-LX  
1000BASE-LH  
1000 Mbps  
1000 Mbps  
1000 Mbps  
full duplex  
full duplex  
full duplex  
auto  
auto  
auto  
Note: If the attached device does not support auto-negotiation, you will have to manually  
configure the other device to match the duplex mode and speed, otherwise it will  
default to half duplex.  
The switch also includes a DB-9 console port on the front panel for switch  
configuration. It also has two FireWire (IEEE 1394) ports that can be used to stack  
up to 8 units for common management access. When multiple units are stacked  
together, you can manage the entire stack by connecting to the console port on the  
Master unit in the stack. The push button on the front panel is used to select the  
Master unit in the stack.  
Note: Only one unit in the stack can act as Master.  
1-4  
 
               
Description of Hardware  
The switch also includes key system and port indicators that simplify installation and  
network troubleshooting. The front panel has LEDs for Ethernet link status/activity  
and VDSL link status, as well as system status indicators.  
The following figure shows the components of the VDSL Switch.  
Expansion Slot  
Ethernet Port  
Status Indicators  
Stacking Master  
Push-button  
Stacking Master  
Status Indicator  
1000BASE-T, 1000BASE-SX,  
1000BASE-X GBIC,100BASE-FX,  
or 10/100BASE-TX modules  
System Status  
Indicators  
VDSL Port  
StatusIndicators  
Power Socket  
VDSL Switch -VS2512A  
Stacking  
VDSL  
Ethernet  
Expansion Module  
1
2
3
4
5
6
7
8
9
10 11 12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
On  
Off  
Link/Speed  
Master  
Console  
100-240V ~ 50-60 Hz 1A  
Up  
Down  
VS2512A  
Reset Button  
Console Port  
Use this for console connections  
Stacking Ports  
VDSL Connector (to Splitter)  
VDSL  
Figure 1-2. VDSL Switch-VS2512A Front and Rear Panels  
VDSL Splitter-VM2524 and VDSL Splitter-VM2548  
Accton’s VDSL Splitter-VM2524 and VDSL Splitter-VM2548 combine data and voice  
signals for delivery over standard telephone cable to multiple users in residential or  
commercial buildings. Data signals from the VDSL Switch port (rear panel) are  
combined with phone signals from the PBX port (rear panel) and then passed to  
multiple users over the VDSL Line port (front panel). The VDSL Splitter-VM2524 can  
support up to 24 line/users. The VDSL Splitter-VM2548 can support up to 48 line/  
users.  
Two VDSL Switch-VS2512A units can be connected to one VDSL Splitter-VM2524,  
or four can be connected to one VDSL Splitter-VM2548, with “Y” cables, via the  
VDSL Switch port.The switch is connected directly to your ISP with fiber optic cable.  
The RJ-21 PBX port on the rear panel connects to PBX/MDF equipment that leads  
to your POTS (Plain Old Telephone Service) provider. The RJ-21 VDSL Line port on  
the front panel connects to a punch-down block or patch panel that distributes phone  
lines to individual users in your building.  
1-5  
 
   
About the VDSL Switch-VS2512A  
The following figures shows the components of the VDSL Splitter-VM2524 and  
VDSL Splitter-VM2548.  
Line  
VDSL Splitter -VM2524  
VM2524  
VDSL Line Connector  
(to end users)  
PBX  
VDSL Switch  
VDSL Line Connector  
(to switch)  
PBX/MDF Connector  
(to POTS provider)  
Figure 1-3. VDSL Splitter-VS2524 Front and Rear Panels  
Line A  
Line B  
VDSL Splitter -VM2548  
VM2548  
VDSL Line Connectors  
(to end users)  
VDSL Line Connectors  
(to switch)  
PBX B  
VDSL Switch B  
PBX A  
VDSL Switch A  
PBX/MDF Connectors  
(to POTS provider)  
Figure 1-4. VDSL Splitter-VS2548 Front and Rear Panels  
Ethernet-over-VDSL CPE  
The Splitter-VM2524 and Splitter-VM2548 are designed to connect to the RJ-11  
VDSL Line port on an ES2002-TS CPE. The CPE provides users with a high-speed  
Internet connection via its RJ-45 Ethernet port and a standard telephone connection  
via its RJ-11 phone jack.  
1-6  
 
     
Description of Hardware  
Status LEDs  
The LEDs, which are located on the VS2512A front panel for easy viewing, are  
shown below and described in the following table.  
VDSL  
Ethernet  
1
2
3
4
5
6
7
8
9
10 11 12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
On  
Off  
Link/Speed  
Master  
Figure 1-5. Port and System LEDs  
Port Status LEDs  
Status  
LED  
Condition  
VDSL Ports  
Link  
On Green  
Port has a valid connection, port enabled  
Flashing Amber  
Port has a valid connection, port disabled  
Port does not have a valid connection  
Shows that traffic is crossing the port  
Shows that no traffic is crossing the port  
Off  
Activity  
Flashing Green  
Off  
Ethernet Ports  
Link/Speed  
On Amber  
Port is operating at 1000 Mbps  
Port is operating at 100 Mbps  
Port is operating at 10 Mbps  
Port is disabled  
On Green  
Flashing Green  
Flashing Amber  
Flashing Green  
Off  
Activity  
Shows that traffic is crossing the port  
Shows that no traffic is crossing the port  
System Status LEDs  
Status  
LED  
Condition  
On  
Power  
Diag  
Switch is receiving power  
System diagnostic test in progress  
Flashing Green  
On Green  
On Amber  
On  
System diagnostic test successfully completed  
System diagnostic test failed  
Stacking  
Master  
Shows that the stacking link is connected  
The switch is the master switch in the stack  
The switch is a slave switch in the stack  
On  
Off  
1-7  
 
       
About the VDSL Switch-VS2512A  
Optional Media Extender Modules  
Optional 1000BASE-SX Module (VM2512A-1SX-SC-M)  
1000BASE-SX Multimode Module  
TX  
RX  
VM2512A-1SX-SC-M  
Figure 1-6. Single-Port 1000BASE-SX Gigabit Module  
Using multimode fiber optic cable, the 1000BASE-SX port can be connected to a  
remote site up to 550 m (1805 ft) away. The 1000BASE-SX Gigabit module operates  
at 1 Gbps, with support for full-duplex mode and flow control. This module is fitted  
with an SC connector, but you can attach an ST plug to the switch using the SC-ST  
Converter (Part Number: ST5002).  
Note: If the attached device does not support auto-negotiation, you will have to manually  
configure the other device to full duplex and no flow control.  
Optional 1000BASE-LX Module (VM2512A-1LX-SC-S)  
1000BASE-LX Singlemode Module  
TX  
RX  
VM2512A-1LX-SC-S  
Figure 1-7. Single-Port 1000BASE-LX Gigabit Module  
Using single-mode fiber optic cable, the 1000BASE-LX port can be connected to a  
remote site up to 5 km (16404 ft) away. The 1000BASE-LX Gigabit module operates  
at 1 Gbps, with support for full-duplex mode and flow control. This module is fitted  
with an SC connector, but you can attach an ST plug to the switch using the SC-ST  
Converter (Part Number: ST5002).  
Note: If the attached device does not support auto-negotiation, you will have to manually  
configure the other device to full duplex and no flow control.  
Optional 1000BASE-X GBIC Module (VM2512A-1GX-GBIC)  
1000BASE-X GBIC Module  
VM2512A-1GX-GBIC  
Figure 1-8. Single Port 1000BASE-X GBIC Module  
1-8  
 
       
Description of Hardware  
1000BASE-SX GBIC transceivers provide one short-wavelength (850 nm) Gigabit  
port that can be used for a high-speed backbone or server connection. This port can  
be connected to a site up to 220 m (722 ft) away with 62.5/125 micron multimode  
fiber cable, or up to 500 m (1641 ft) with 50/125 micron multimode fiber cable.  
1000BASE-LX GBIC transceivers provide one long-wavelength (1300 nm) Gigabit  
port that can be used for a high-speed backbone or server connection. This port can  
be connected to a site up to 5 km (16404 ft) away with single-mode fiber cable.  
1000BASE-LH GBIC transceivers provide one long-wavelength (1550 nm) Gigabit  
port that can be used for a long-haul connection to a remote location. This port can  
be connected to a site up to 70 km (43.5 miles) away with single-mode fiber cable.  
Caution: Install only 5 V GBIC transceivers into the module slots  
Optional 1000BASE-T Module (VM2512A-1GT)  
1000BASE-T Module  
VM2512A-1GT  
Figure 1-9. Single-Port 1000BASE-T Gigabit Module  
Using Category 5 or 5e twisted-pair cable you can connect to another device up to  
100 m (328 ft) away. The 1000BASE-T module operates at 10, 100, or 1000 Mbps,  
full duplex, and supports auto-negotiation of speed and flow control. Note that you  
should first test the cable installation for IEEE 802.3ab compliance. See  
If the attached device does not support auto-negotiation, you will have to manually  
configure the other device to match the speed and duplex mode with no flow control.  
Optional 10/100BASE-TX Module (VM2512A-1TX)  
10/100BASE-TX Module  
VM2512A-1TX  
Figure 1-10. 1-Port 10/100BASE-TX Module  
Using Category 3, 4, or 5 twisted-pair cable for 10 Mbps links or Category 5  
twisted-pair cable for 100 Mbps links, you can connect to another device up to  
100 m (328 ft) away. The 10/100BASE-TX module operates at 10/100 Mbps, full  
and half duplex, and supports auto-negotiation of speed and flow control.  
1-9  
 
   
About the VDSL Switch-VS2512A  
Optional 10/100BASE-TX Module (VM2512A-4TX)  
10/100BASE-TX Module  
VM2512A-4TX  
Figure 1-11. 4-Port 10/100BASE-TX Module  
Using Category 3, 4, or 5 twisted-pair cable for 10 Mbps links or Category 5  
twisted-pair cable for 100 Mbps links, you can connect to another device up to  
100 m (328 ft) away. The 10/100BASE-TX module operates at 10, 100 Mbps, full  
and half duplex, and supports auto-negotiation of speed and flow control.  
Optional 100BASE-FX Module (VM2512A-1FX-SC-M)  
100BASE-FX Multimode Module  
VM2512A-1FX-SC-M  
Figure 1-12. 1-Port 100BASE-FX Multimode Module  
Using 62.5/125 or 50/125 micron multimode fiber cable, the 100BASE-FX port can  
be connected to a remote site up to 2 km (1.24 miles) away. The 100BASE-FX  
module operates at 100 Mbps, with support for full-duplex mode and flow control.  
This module is fitted with an SC connector.  
Optional 100BASE-FX Module (VM2512A-4FX-MTRJ-M)  
100BASE-FX Multimode Module  
VM2512A-4FX-MTRJ-M  
Figure 1-13. 4-Port 100BASE-FX Multimode Module  
Using 62.5/125 or 50/125 micron multimode fiber cable, the 100BASE-FX ports can  
be connected to a remote site up to 2 km (1.24 miles) away. The 100BASE-FX  
module operates at 100 Mbps, with support for full-duplex mode and flow control.  
This module is fitted with 4 MT-RJ connectors.  
1-10  
 
   
Description of Hardware  
Optional 100BASE-FX Module (VM2512A-4FX-MTRJ-S)  
100BASE-FX Singlemode Module  
VM2512A-4FX-MTRJ-S  
Figure 1-14. 4-Port 100BASE-FX Single-mode Module  
Using 9/125 micron single-mode fiber cable, the 100BASE-FX ports can be  
connected to a remote site up to 20 km (12.43 miles) away. The 100BASE-FX  
module operates at 100 Mbps, with support for full-duplex mode and flow control.  
This module is fitted with 4 MT-RJ connectors  
Power Supply Receptacle  
There is a power receptacle on the front panel of the switch for the AC power cord.  
VDSL Switch -VS2512A  
Console  
100-240V ~ 50-60 Hz 1A  
VS2512A  
Figure 1-15. Power Supply Receptacle  
1-11  
 
 
About the VDSL Switch-VS2512A  
Key Features  
VDSL features (CPE side) include:  
• High-speed Internet access over existing phone lines  
• VDSL connection provides the following rate/range options:  
Rate  
15 Mbps  
Mode  
Symmetric  
Symmetric  
Symmetric  
Max. Range  
1070 m (3500 ft)  
1220 m (4000 ft)  
1525 m (5000 ft)  
10 Mbps  
5 Mbps  
• Concurrent data and telephone services (voice/ISDN) over a single connection  
• Always-on digital connection eliminates dial-up delays, and transparent  
reconnection when initiating any network request  
• Supports evolving ETSI, ANSI and ITU VDSL standards for the copper local loop  
• Spectral compatibility with POTS, ISDN (2B1Q/4B3T) or “Smartphone” digital PBX  
• Port-to-port isolation for Ethernet  
• Robust operation on severely distorted lines  
• Supports power back-off algorithm that permits a mixed distance deployment  
Ethernet features (CO side) include:  
• Optional 1-port 1000BASE-T, 1-port 1000BASE-SX,1-port 1000BASE-X GBIC,  
4-Port 100BASE-FX, or 4-Port 10/100BASE-TX modules  
• Compliant to IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX and  
100BASE-FX Fast Ethernet, IEEE 802.3ab Gigabit Ethernet, and IEEE 802.3z  
Gigabit Ethernet standards  
• The 1000BASE-T port auto-negotiates Ethernet connection at 10/100/1000 Mbps,  
full/half duplex at 10/100 Mbps, full duplex at 1000Mbps  
• The 1000BASE-SX port cannot be set to auto-negotiation; it is fixed at 1000 Mbps,  
full duplex  
• The 100BASE-FX ports cannot be set to auto-negotiation; they are fixed at  
1000 Mbps, full duplex  
• The 10/100BASE-TX ports auto-negotiate Ethernet connection at 10/100 Mbps,  
full/half duplex  
• Provides back pressure for half duplex and IEEE 802.3x flow control for full duplex  
System features include:  
• LEDs indicate Ethernet link status/activity, VDSL link status, and System status  
• Stacks up to 8 units for console management  
• Simple plug-and-play installation  
• Switch fabric bandwidth of 9.8 Gbps  
• Switching table with a total of 8K entries  
• Transparent bridging  
1-12  
 
     
Key Features  
• Provides Store-and-Forward switching for intra-VLAN traffic  
• Supports wire-speed Layer 2 switching  
• Supports flow control, using back pressure for half duplex and IEEE 802.3x for full  
duplex  
• Broadcast Storm Control  
• Desktop or rack-mountable  
Management features include:  
• “At-a-glance” LEDs for easy troubleshooting  
• Network management agent:  
• Manages switch in-band or out-of-band  
• Supports Telnet, SNMP/RMON and Web-based interface  
• Spanning Tree Protocol for redundant network connections  
• VLAN Support with up to 255 groups, port-based or with 802.1Q VLAN  
tagging, and GVRP for automatic VLAN learning  
• Quality of Service (QoS) supports four levels of priority and Weighted Round  
Robin Queueing  
• Multicast Switching based on IGMP Snooping  
• Port trunking supported with 2 Gigabit ports.  
1-13  
 
 
About the VDSL Switch-VS2512A  
1-14  
 
Chapter 2: Network Planning  
Introduction to Switching  
A network switch allows simultaneous transmission of multiple packets via  
non-crossbar switching. This means that it can partition a network more efficiently  
than bridges or routers. The switch has, therefore, been recognized as one of the  
most important building blocks for today’s networking technology.  
When performance bottlenecks are caused by congestion at the network access  
point (such as the network card for a high-volume file server), the device  
experiencing congestion (server or power user) can be attached directly to a  
switched port. And, by using full-duplex mode, the bandwidth to the end-user can be  
doubled to maximize throughput.  
A switch can be easily configured in any Ethernet network to significantly boost  
bandwidth while using conventional cabling and network cards.  
Sample Applications  
VDSL provides significant savings on network installation, equipment and service  
fees. Internet services operate over existing phone cabling and a minimal amount of  
network equipment. The only changes require installing an ES2002-TS CPE for  
each client, and a VDSL Switch-VS2512A and VDSL Splitter-VM2524 in the  
basement or wiring closet. Internet service can then be provided over a direct  
Ethernet connection to your ISP. For non-commercial environments, you can run the  
switch through a broadband router at the customer’s site. This will allow you to use a  
single-user account and ISP sharing to significantly reduce network access charges.  
Accton’s VDSL Switch-VS2512A provides Internet connections of up to 15 Mbps, full  
duplex, for multiple users. Cable distances also can run up to 1525 meters (at lower  
transmission rates). VDSL installation is extremely economical for multiple-tenant  
dwellings such as apartment buildings, hotels or school dormitories, as well as  
commercial buildings.  
VDSL provides multiple-user access to the Internet with benefits including:  
• Internet services such as e-mail over faster connections than currently possible  
with other options such as cable modem or ADSL  
• Multimedia applications such as video and virtual gaming made available to the  
broader public for the first time  
• Access to corporate intranets at speeds close to that available in the office  
Both local network applications and Internet services are supported for commercial  
environments.  
2-1  
 
         
Network Planning  
Internet Connections  
The figure below shows a VDSL Switch-VS2512A and VDSL Splitter-VM2524  
providing a broadband data service to a multi-tenant residential or commercial  
building. In this implementation, fiber optic cable carries data from a telephone  
company’s central office to the building; then the installed telephone copper wires  
take the data and deliver it to individual units within that building.  
Existing Phone  
Lines to Clients  
Local Servers  
(Locally Hosted Services,  
VDSL  
VDSL  
Switch-VS2512A  
Video Servers, Billing)  
Splitter-VM2524  
Punch Down  
Blocks /  
Patch Panels  
-
V
22  
AA  
A
V
D
S
L
S
wi  
tch  
100-240V  
50-60  
Hz 1A  
~
E
t
h
e
r
n
e
t
4
S
 a
   c
k
ni  
g
Powerr  
Reset  
ossle  
V
2
1
2
V
6
D
S
L
8
9
10  
1
1
12  
A
c
t
v
i
Diagag  
/
p
e
e
d
2
3
4
5
L
i
 n
k
1
A
c
t
  i
 t
S
t
 a
   c
k
k
 i
 i
g
OOfn  
Linknk  
Mastter  
E
x
pan  
s
i
o
n
M
o
d
u
l
e
U
Dw
M
odule  
100BASE-FX Singlemode  
inglemode  
V
M
2
5
1
S
p
l
i
t
-
V
M
V
D
S
L
r
V
M
2524  
L
i
n
e
ISP  
(Internet)  
Phone Lines  
VDSL Lines  
Fiber Optic Link to ISP  
PBX  
Telephone Line from Central Office Central Office  
(PSTN)  
Multi-dwelling/Multi-tenant Building  
Figure 2-1. Internet Connections  
Remote Connections with Fiber Cable  
Fiber optic technology allows for longer cabling than any other media type. A  
1000BASE-SX MMF Gigabit link can connect to a site up to 550m away. This allows  
end-users in two sites to use the same Internet connection, share server resources,  
and communicate with each other.  
In the figure below, a 1000BASE-SX port on the bottom VDSL Switch-VS2512A in  
the stack in Building 1 is providing 1000 Mbps connectivity to the VDSL  
Switch-VS2512A in Building 2.  
Existing Phone  
Lines to Clients  
Local Servers  
(Locally Hosted Services,  
Video Servers, Billing)  
ISP  
(Internet)  
VDSL  
Switch-VS2512A  
VDSL  
Splitter-VM2524  
Punch Down  
Blocks /  
L
i
t
-
2
2
V
D
S
~
50-60  
Hz  
1A  
100-240V  
E
t
h
e
r
n
e
t
4
S
t
 a
   c
k
 i
g
Power  
Reset  
Consolee  
V
2
5
2
1
1
12  
A
c
t
  i
i
y
1
2
Diagga  
Patch Panels  
V
6
D
S
L
8
9
10  
L
i
  k
/
1
2
3
4
5
 n
t
c
k
 i
A
c
t
v
i
yt  
S
 a
   c
k
ni  
g
Onnf  
f
Linknk  
-
V
Masterer  
V
D
S
L
S
w
d
u
Down  
~
S
E
-
S
X
M
u
o
d
e
M
o
d
u
l
E
x
p
a
n
s
i
o
n
M
o
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t
c
k
 i
S
5
100-24  
0V  
50-60 Hz 1A  
l
i
E
t
h
ni  
g
Con  
sle  
1000BASE-SX  
00BA  
Mu  
1
2
e
r
n
e
t
4
 a
   c
k
Power  
C  
Reset  
V
1
1
TX  
RX  
3
4
5
V
6
D
S
L
8
9
10  
12  
L
i
 n
k
Ac  
S
p
edd  
ytt  
Diagag  
2
V
M
2
5
1
2
A
-
1
S
X
-
S
C
-
M
S
t
 a
   c
k
k
 i
ni  
g
O
n
A
c
t
 L
i
yt  
niLi  
1
Masterer  
d
u
l
e
M
o
d
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l
e
E
x
p
a
n
s
i
o
n
M
o
U
p
Down  
S
p
l
i
t
t
e
r
-
V
1
0
0
0
B
A
S
E
-
S
X
M
u
l
t
i
o
d
e
V
D
S
L
TX  
RX  
V
M
2
5
2
4
V
M
2
5
1
L
i
n
e
Phone Lines  
VDSL Lines  
Fiber Optic Link to ISP  
PBX  
Telephone Line from Central Office Central Office  
(PSTN)  
Multi-dwelling/Multi-tenant Building 1  
1000BASE-SX (550 m)  
Existing Phone  
Lines to Clients  
VDSL  
Switch-VS2512A  
VDSL  
Local Servers  
(Locally Hosted Services,  
Video Servers, Billing)  
Splitter-VM2524  
Punch Down  
Blocks /  
Patch Panels  
-
V
S
2
5
1
V
D
S
L
S
w
~
H
z
 -
 6
0
e
S
t
c
k
 i
g
A
0-20
100-240V  
5-0  
5
0
Hz  
1A  
E
2
h
e
r
n
t
4
 a
   c
k
Power  
Reset  
onolee  
V
2
5
1
V
6
D
S
L
8
9
1
0
1
1
1
2
Act vi  
peedd  
S
p
  i
i
1
D
i
g
L
i
  k
/
v
i
y
1
2
3
4
5
 n
A
c
t
  i
S
t
c
k
 i
g
O
f
Linkk  
Mastter  
U
p
D
o
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n
E
-
S
X
l
M
o
d
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l
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E
x
p
a
n
s
i
o
n
M
o
d
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l
e
M
u
ti  
t mi ode Mod  
e
1000BASE-SX  
TX  
RX  
V
M
2
5
V
M
2
5
2
V
D
S
L
S
plitter  
-
V
M
2
5
2
4
L
i
n
Phone Lines  
VDSL Lines  
PBX  
Central Office  
(PSTN)  
Telephone Line from Central Office  
Multi-dwelling/Multi-tenant Building 2  
Figure 2-2. Remote Connection with Fiber Cable  
2-2  
 
           
Sample Applications  
Making VLAN Connections  
VLANs can be based on port groups, or each data frame can be explicitly tagged to  
identify the VLAN group to which it belongs. When using port-based VLANs, ports  
can be assigned to one or more groups. Port-based VLANs are suitable for small  
networks. A single switch can be easily configured to support several VLAN groups  
for various organizational entities (such as Finance and Marketing).  
When VLANs cross switches linked by Ethernet connections, you must use VLAN  
tagging. This allows you to assign multiple VLAN groups to the “trunk” ports (that is,  
tagged ports) connecting different switches.  
This switch also has a Private VLAN feature. This allows modification of the default  
VLAN to provide port-based security and isolation between ports within the VLAN.  
Data traffic on these ports can only be forwarded to, and from, the uplink port.  
Private VLANs and normal VLANs can exist simultaneously within the same switch.  
In the figure below, ports 1-5, connected to four end users and a server, are  
configured into a normal VLAN. The remaining ports are configured into a private  
VLAN.  
Ports 1-5 in VLAN 2  
Ports 6-24 in a Private VLAN  
VDSL Splitter-VM2524  
-VM2524  
Splitter  
VDSL  
V
M2524  
-VS2512A  
Switch  
VDSL  
z
1
A
Line  
50-60  
H
~
40V  
100-2240V  
t
Powwerr  
Reset  
E
t
h
e
r
n
e
t
ng  
l
ol
VS2512A  
VDSL Switch-VS2512A  
4
Staaccking  
3
2
1
12  
ctivity  
V
6
D
S
L
7
10  
1
1
Activity  
peed  
Diag  
9
8
5
Link/Sp  
ink/S  
4
3
2
1
ity  
Activity  
On  
Off  
Sttacckiinngg  
Linnkk  
er  
Maste  
Module  
Dowwnn  
Expansion  
Up  
le  
de  
Multimode  
MModule  
Mul  
SX  
SE-  
0BA  
10000BASE-SX  
RX  
TX  
VM2512A-1SX-SC-M  
Fiber Optic Link to ISP  
Phone Lines to Central Office  
ISP  
(Internet)  
Central Office  
(PSTN)  
Figure 2-3. Making VLAN Connections  
Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use  
untagged ports.  
2-3  
 
       
Network Planning  
Application Notes  
1. For network applications that require routing between dissimilar network types,  
you can attach the VDSL switch directly to a router.  
2. The multimode fiber modules are fitted with SC connectors, but you can attach  
an ST plug to the switch using Accton’s optional SC-to-ST plug converter (Part  
Number: ST5002, for 62.5/125 micron cable only). If you do use an ST plug  
converter, be sure you run cable from the Rx (Tx) port on the module to the Tx  
(Rx) port on the target device.  
3. As a general rule the length of Gigabit fiber optic cable for a single switched link  
should not exceed 550 m (1805 ft) for multimode fiber or 5 km (16404 ft) for  
single-mode fiber.  
However, power budget constraints must also be considered when calculating  
the maximum cable length for your specific environment.  
2-4  
 
   
Chapter 3: Installing the VDSL Switch and Splitter  
Preparing the Site  
In multi-tenant buildings, phone lines coming from the service provider are generally  
attached to a PBX or MDF distribution box in the basement. These lines run from the  
PBX to a punch-down block, and then up to the POTS terminals for individual users.  
The following figure displays the normal wiring before installing the VDSL switch and  
splitter.  
Existing Phone  
Lines to Clients  
Upper Floors  
Basement  
Punch-Down Blocks  
Telephone Line  
PBX  
from Central Office  
Figure 3-1. Wiring before VDSL Switch and Splitter Installation  
Installing Additional Phone Line Equipment  
The switch and splitter should be installed close to the PBX and the punch-down  
block, usually in the basement or wiring closet. You may also want to install a rack  
for distribution equipment, such as a splitter, switch, router, or patch panel.  
An optional patch panel can be used to connect the circuits between the splitter and  
the punch-down blocks. If a patch panel is not used, the splitter connects directly to  
the PBX for the incoming phone lines and the punch-down block used for the VDSL  
lines running up to the end users. In this case, the punch-down blocks must have an  
RJ-21 connector.  
Equipment Checklist  
Before installing the switch and splitter, verify that you have all the items listed under  
“Package Contents.” If any of the items are missing or damaged, contact your local  
Accton distributor. Also, be sure you have all the necessary tools and cabling before  
installing the switch and splitter. Note that these devices can be installed on any  
suitably large flat surface or in a standard EIA 19-inch rack.  
3-1  
 
         
Installing the VDSL Switch and Splitter  
Package Contents  
VDSL Switch-VS2512A  
• VDSL Switch-VS2512A  
• Four adhesive foot pads  
• Bracket Mounting Kit containing two brackets and four screws for attaching the  
brackets to the switch  
• One Power Cord—either US, Continental Europe or UK  
• RS-232 console cable  
• One FireWire Stack Cable  
• This Installation Guide  
• Management Guide  
VDSL Splitter-VM2524/2548  
• VDSL Splitter-VM2524 or VDSL Splitter-VM2548  
• Four adhesive foot pads  
• Bracket Mounting Kit containing two brackets and four screws for attaching the  
brackets to the splitter  
• This Installation Guide  
Please complete the warranty registration card and return to Accton, or register  
online at: register.acctontech.com.  
Please inform your dealer if there are any incorrect, missing or damaged parts. If  
possible, retain the carton, including the original packing materials. Use them again  
to repack the product in case there is a need to return it for repair.  
Optional Rack-Mounting Equipment  
If you plan to rack-mount the switch and splitter, be sure to have the following  
equipment available:  
• Four mounting screws for each device you plan to install in a rack—these are not  
included  
• A screwdriver (Phillips or flathead, depending on the type of screws used)  
Mounting  
The switch and splitter may be mounted on any flat surface, such as a shelf, or in a  
rack.  
Before you start installing the switch and splitter, make sure you can provide the  
right operating environment, including power requirements, sufficient physical  
space, and proximity to other network devices that are to be connected. Verify the  
following installation requirements:  
3-2  
 
           
Mounting  
• Power requirements: 100 to 240 VAC (± 10%) at 50 to 60 Hz (± 3Hz). The switch  
and splitter power supplies automatically adjust to the input voltage level. Make  
sure that a properly grounded power outlet is within 2.5 m (8 ft) of the switch and  
splitter.  
• The switch and splitter should be located in a cool dry place, with at least 10 cm  
(4 in.) of space on the sides for ventilation.  
• Place the switch and splitter out of direct sunlight, and away from heat sources or  
areas with a high amount of electromagnetic interference. The temperature and  
humidity should be within the ranges listed in the specifications.  
• If you intend to mount the switch and splitter in a rack, make sure you have all the  
necessary mounting screws, brackets, bolts and nuts, and the right tools.  
• Check if network cables and connectors needed for installation are available.  
• Be sure the splitter is within reach of the punch-down blocks (or patch panel) for  
rear panel connections and within reach of the VDSL switch for front panel  
connections.  
Installing Optional Modules: Before mounting the switch, be sure you install any  
optional modules. If you have purchased an optional slide-in 1000BASE-SX,  
1000BASE-T, 1000BASE-LX, 1000BASE-X GBIC, 10/100BASE-TX or  
100BASE-FX media expansion module, install it now, following the instructions  
To rack-mount devices:  
1. Attach the brackets to the device using the screws provided in the Bracket  
Mounting Kit.  
E
x
pan  
sion  
M
o
du  
le  
St  
ac  
ki  
ng  
U
p
D
ow  
M
as  
te  
n
1
r
A
ct  
ivit  
2
3
O
n
O
ff  
y
VDSL  
4
5
Li  
nk  
6
7
8
9
10  
11  
12  
Ethernet  
1
2
Ac  
tiv  
ity  
3
4
Li  
nk  
/S  
pe  
St  
ac  
ki  
ng  
ed  
Po  
w
er  
VDSL  
Switch  
-VS2512
R
es  
et  
D
ia  
g
C
on  
so  
le  
VS2512A  
10  
0-  
24  
0V  
~
50  
-6  
0
H
z
1A  
Figure 3-2. Attaching the Brackets  
3-3  
 
     
Installing the VDSL Switch and Splitter  
2. Mount the device in the rack, using four rack-mounting screws (not provided).  
E
xp  
ans  
io  
n
M
od  
ule  
S
ta  
ck  
in  
g
U
p
D
ow  
M
as  
n
te  
1
r
A
ct  
O
O
ivit  
2
3
n
ff  
y
VDSL  
4
5
Li  
6
7
nk  
8
9
10  
11  
12  
Ethernet  
1
2
A
ct  
iv  
ity  
3
4
Li  
nk  
/S  
pe  
S
ta  
ed  
ck  
D
in  
g
g
P
ow  
VDSL  
er  
Switch  
R
es  
-VS2512
ia  
et  
C
on  
so  
le  
VS2512A  
10  
0-  
24  
0V  
~
50  
-6  
0
H
z
1A  
Figure 3-3. Installing the Switch in a Rack  
3. If installing a single switch only, turn to “Powering On the Switch” at the end of  
this chapter.  
4. If installing several devices, we recommend using one stack for the switches,  
and another for the splitters. this will keep the cabling straight and easy to  
maintain.  
Desktop or Shelf Mounting  
1. Attach the four adhesive feet to the bottom of the first switch.  
A
1
z
H
0 6  
-
0 5  
~
V
0 4 2  
-
0 0 1  
V S 2 5 1 2 A  
C o n s o l e  
V - S 2 5 1 2 A  
S w i t c h  
V D S L  
D i a g  
R e s e t  
P o w e r  
S t a c k i n g  
4
L i n k / S p e e d  
A c t i v i t y  
3
1
2
E t h e r n e t  
2 1  
1 1  
0 1  
9
8
7
6
L i n k  
5
f
O f  
O n  
4
V D S L  
2
3
A c t i v i t y  
1
M a s t e r  
D o w n  
U p  
S t i
l e  
u
d
o
M
n
i o  
s
n
a
p
x
E
Figure 3-4. Attaching the Adhesive Feet  
2. Set the device on a flat surface near an AC power source, making sure there  
are at least two inches of space on all sides for proper air flow.  
3-4  
 
     
Mounting  
3. If installing a single switch only, go to “Powering On the Switch” at the end of  
this chapter.  
4. If installing multiple switches, attach four adhesive feet to each one. Place each  
device squarely on top of the one below, in any order.  
Installing an Optional Module into the Switch  
Expansion  
M
odule  
1000BA  
SE  
SX-S  
C
Expansion  
M
odule  
V
M
2
5
1
2
A
-1  
-S  
X
-S  
C
-M  
T
X
R
X
Figure 3-5. Installing an Optional Module  
Caution: DO NOT install slide-in modules with the switch powered on. Be sure you  
power off the switch before installing any module.  
To install an optional module into the switch, do the following:  
1. Disconnect power to the switch.  
2. Remove the blank metal plate (or a previously installed module) from the  
appropriate slot by removing the two screws with a flat-head screwdriver.  
3. Before opening the package that contains the module, touch the bag to the  
switch casing to discharge any potential static electricity. Also, it is  
recommended to use an ESD wrist strap during installation.  
4. Remove the module from the anti-static shielded bag.  
5. Holding the module level, guide it into the carrier rails on each side and gently  
push it all the way into the slot, ensuring that it firmly engages with the  
connector.  
6. If you are sure the module is properly mated with the connector, tighten the  
retainer screws to secure the module in the slot.  
3-5  
 
 
Installing the VDSL Switch and Splitter  
Installing a GBIC Transceiver  
Figure 3-6. Installing a GBIC Transceiver  
Caution: Install only 5 V GBIC transceivers into the module slots.  
You can install a GBIC transceiver as described below:  
1. Insert the transceiver with the SC connector facing out toward you. Note that  
the transceiver is keyed so that it can only be installed in one orientation.  
2. Press in on the transceiver’s side tabs, and gently slide it into the GBIC  
interface slot until it clicks into place.  
Caution: Install only 5 V GBIC transceivers into the module slots.  
Note:  
GBIC transceivers are hot-swappable. You do not need to power off the switch  
before installing or removing a transceiver.  
3-6  
 
   
Powering On the Switch  
Connecting to the Stack’s Backplane  
Plug one end of the provided stack cable in the “Down” port of the top unit and the  
other end to the “Up” port of the next unit. Repeat this step for each unit in the stack.  
Form a simple chain starting at the “Down” port on the top unit and ending at the  
“Up” port on the bottom unit (stacking up to 8 units).The VDSL Switch-VS2512A  
supports a wrap-around stacking feature. If a connection is made between the  
“Down” port of the bottom switch in the stack and the “Up” port of the top switch,  
then all switches in the stack will remain connected, even if one fails.  
Stacking  
Master  
On  
Of  
f
Stacking  
Master  
n  
On  
Of  
f
Stacking  
Master  
On  
O
ff  
Figure 3-7. Connecting to the Stack’s Backplane  
Select the Master unit in the stack by pushing the push button in on the front of the  
switch.  
Note:  
Only one switch in the stack can act as Master.  
Powering On the Switch  
To connect a device to a power source:  
1. Insert the power cable plug directly into the receptacle located at the front of the  
switch.  
VDSL Switch -VS2512A  
Console  
100-240V ~ 50-60 Hz 1A  
VS2512A  
Figure 3-8. Power Receptacle  
2. Plug the other end of the cable into a grounded, 3-pin socket.  
Note:  
For International use, you may need to change the AC line cord. You must use  
a line cord set that has been approved for the receptacle type in your country.  
3-7  
 
       
Installing the VDSL Switch and Splitter  
3. Check the front-panel LEDs as the switch is powered on to be sure the Power  
LED is lit. If not, check that the power cable is correctly plugged in. The switch  
will automatically select the setting that matches the connected input voltage.  
Therefore, no additional adjustments are necessary when connecting it to any  
input voltage within the range marked on the front panel.  
4. The switch performs a self-diagnostic test upon power-on.  
Note:  
The unit supports a “hot remove” feature which permits you to connect or  
disconnect network cables without powering off the unit and without disrupting  
the operation of the devices attached to the unit.  
3-8  
 
Chapter 4: Making Network Connections  
Twisted-Pair Devices  
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors  
at both ends. For 100BASE-TX connections, Category 5 cable is required; for  
10BASE-T, Category 3, 4 or 5 cable can be used.  
Cabling Guidelines  
The RJ-45 ports on the switch support automatic MDI/MDI-X operation, so you can  
use standard straight-through twisted-pair cables to connect to any other network  
device (PCs, servers, switches, routers, or hubs).  
Note: Auto-negotiation must be enabled for automatic MDI/MDI-X pinout configuration.  
See Appendix B for further information on cabling.  
Connecting to the Punch-down Blocks  
The splitter connects directly to the PBX and building’s phone-line punch-down  
block with RJ-21 connectors. Follow the steps listed below to connect the splitter.  
1. Connect one RJ-21 flat cable from the PBX/MDF to the RJ-21 connector on the  
back of the splitter labeled “PBX.”  
2. Connect the other RJ-21 flat cable from the punch-down block to the RJ-21  
connector on the front of the splitter labeled “Line.”  
The RJ-21 port on punch-down blocks must be wired to match the pin assignments  
of ports on the back of the splitter. To ensure that your cables are properly wired,  
Note: If you are using a patch panel, connect the RJ-21 ports on the back of the splitter  
directly to the corresponding ports on the patch panel, and then manually wire  
each pair (up to 24) from the patch panel to the punch-down blocks.  
4-1  
 
           
Making Network Connections  
.
ES2002-TS  
VDSL CPE  
Room  
Basement  
Punch  
Down  
Blocks  
Telephone Line  
from Central Office  
PBX  
PBX/MDF  
Line  
VDSL  
Line  
Line  
VDSL Splitter -VM2524  
VDSL  
Splitter  
VM2524  
100BASE-FX Singlemode Module  
VDSL Switch -VS2512A  
Stacking  
VDSL  
Ethernet  
1
2
3
4
5
6
7
8
9
1
0
1
1
1
2
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
On  
Off  
VM2512A-4FX-MTRJ-S  
Link/Speed  
Master  
Console  
100-240V ~ 50-60 Hz 1A  
Up  
Down  
VS2512A  
To ISP Provider  
Figure 4-1. Connecting to the Punch-down Blocks  
Wiring Closet Connections  
Today, the punch-down block is an integral part of many of the newer equipment  
racks. It is actually part of the patch panel. Instructions for making connections in the  
wiring closet with this type of equipment follows.  
1. Connect RJ-21 flat cables from the patch panel to the RJ-21 connectors on the  
front of the splitters labeled “Line.”  
4-2  
 
   
Connecting to the Punch-down Blocks  
2. Label the cables to simplify future troubleshooting.  
To end users  
To ISP (Internet)  
Patch Panel  
1
0
0
0
B
A
S
E
-
S
X
M
u
l
t
i
m
o
d
e
M
o
d
u
l
e
T
S
V
D
S
L
S
w
i
t
c
h
-
V
S
2
5
1
2
A
Stacking  
V
6
D
S
L
7
Ethernet  
Expansion Module  
1
2
3
4
5
8
9
10  
1
1
12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
TX  
RX  
On  
Off  
Link/Speed  
VM2512A-1SX-SC-M  
Master  
l
1
0
0
-
2
4
0
V
~
5
0
-
6
0
H
z
1
A
Up  
Down  
V
S
2
5
1
2
A
Telephone Line  
from Central Office  
L
i
n
e
V
D
S
L
S
p
l
i
t
t
e
r
-
VM25  
2
4
T
r
S
c
h
/
0
0
3
T
ig  
e
r
i
c
h
1
7
2
/1  
4
0
L
0
3
r
S
t  
t  
t  
c
h
0
0
0
E
t
h
e
r
n
e
t
V
D
S
L
S
w
i
t
c
h
-
V
S
2
5
1
2
A
6
7
2
V
6
D
S
L
7
Stacking  
Stacking  
Stacking  
Expansion Module  
Expansion Module  
Expansion Module  
1
2
3
4
5
8
9
10  
1
1
12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
On  
Off  
Link/Speed  
Master  
Master  
Master  
onol
1
0
0
-
2
4
0
V
~
5
0
-
6
0
H
z
1
A
V
M
2
5
2
4
Up  
p  
Down  
Dn  
Do
VS2512A  
L
i
n
e
V
D
S
L
S
p
l
r
-
VM25  
2
4
T
ig  
e
r
i
c
h
1
/1  
4
0
L
0
3
T
r
S
c
h
0
/
0
0
3
7
2
V
D
S
L
S
w
i
t
c
h
-
VS2512A  
6
7
2
V
6
D
S
L
7
E
t
h
e
r
n
e
t
1
2
3
4
5
8
9
10  
1
1
12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
On  
Off  
Link/Speed  
onol
V
M
2
5
2
4
V
S
2
5
1
2
A
1
0
0
-
2
4
0
V
~
5
0
-
6
0
H
z
1
A
PBX  
T
r
S
c
h
6
7
0
2
/
0
0
3
V
D
S
L
S
w
i
t
c
h
-VS2512A  
V
6
D
S
L
7
E
t
h
e
r
n
e
t
1
2
3
4
5
8
9
10  
1
1
12  
1
2
3
4
Stacking  
Diag  
Power  
Activity  
Link  
Activity  
Reset  
On  
Off  
Link/Speed  
Console  
1
0
0
-
2
4
0
V
~
5
0
-
6
0
H
z
1
A
V
S2512A  
Splitter Stack  
Switch Stack  
Y cables  
Figure 4-2. Wiring Closet Connections  
Fiber Optic Devices  
An optional slide-in 1000BASE-SX, 1000BASE-LX or 100BASE-FX module, or  
1000BASE-X transceiver may be used for backbone and long distance connections,  
or for ISP (Internet) connections. A 1000BASE-SX, 100BASE-LX or 1000BASE-X  
transceiver may also be used for connecting to a high-speed server.  
MT-RJ Connections  
Each single-mode device requires a 9/125 micron multimode fiber optic cable with  
MT-RJ connectors at both ends. Each multimode device requires a 62.5/125 micron  
or 50/125 micron multimode fiber optic cable with MT-RJ connectors at both ends.  
1. Remove and keep the MT-RJ port’s plastic cover. When not connected to a  
fiber cable, the cover should be replaced to protect the optics.  
2. Check that the fiber terminators are clean. Dirty fiber terminators on fiber optic  
cables will impair the quality of the light transmitted through the cable and lead  
to degraded performance on the port.  
3. Connect one end of the cable to the MT-RJ port on the switch and the other end  
to the MT-RJ port on the other device. Since MT-RJ connectors are keyed, the  
cable can be attached in only one orientation.  
4. As each connection is made, check the Link LED on the switch’s front panel for  
the corresponding port to be sure that the connection is valid  
SC Connections  
Each single-imode fiber optic port requires 9/125 micron multimode fiber optic  
cabling with an SC connector at both ends. Each multimode fiber optic port requires  
50/125 or 62.5/125 micron multimode fiber optic cabling with an SC connector at  
both ends. If you need to connect to a device with 62.5/125 micron cable that has  
ST-type connectors, Accton provides an optional SC-ST Converter (Part Number:  
ST5002).  
4-3  
 
         
Making Network Connections  
Caution: This switch uses lasers to transmit signals over fiber optic cable. The lasers are  
compliant with the requirements of a Class 1 Laser Product and are inherently  
eye safe in normal operation. However, you should never look directly at a  
transmit port when it is powered on.  
1. Remove and keep the SC port’s rubber cover. When not connected to a fiber  
cable, the rubber cover should be replaced to protect the optics.  
2. Check that the fiber terminators are clean. You can clean the cable plugs by  
wiping them gently with a clean tissue or cotton ball moistened with a little  
ethanol. Dirty fiber terminators on fiber cables will impair the quality of the light  
transmitted through the cable and lead to degraded performance on the port.  
3. Connect one end of the cable to the SC port on the switch and the other end to  
the SC port on the other device. Since SC connectors are keyed, the cable can  
be attached in only one orientation.  
Expansion  
M
odule  
SC fiber connector  
Figure 4-3. Making SC Port Connections  
4. As a connection is made, check the Link LED on the switch corresponding to  
the port to be sure that the connection is valid.  
Note: If you use the optional SC-ST Converter, be sure to connect the converter’s Tx  
(Rx) port to the Rx (Tx) port on the other device.  
1000BASE-SX, 1000BASE-LX and 1000BASE-LH fiber optic ports operate at  
1 Gbps full duplex, with auto-negotiation of flow control. 100BASE-FX connections  
operate at 100 Mbps, full duplex, with auto-negotiation of flow control.  
4-4  
 
     
Appendix A: Troubleshooting  
Diagnosing Switch Indicators  
The VDSL Switch-VS2512A can be easily monitored through panel indicators to  
identify problems.The table below describes common problems you may encounter  
and possible solutions. If the solutions in the table fail to resolve the problem contact  
Accton Technical Support for advice.  
Symptom  
Cause  
Solution  
POWER indicator  
does not light up  
after power on.  
Power outlet, power  
cord, or internal power  
supply may be  
• Check the power outlet by plugging in another  
device that is functioning properly.  
• Check the power cord with another device.  
defective.  
If these measures fail to resolve the problem, have  
the unit’s power supply replaced by a qualified  
Accton distributor.  
ETHERNET LINK  
indicator does not  
light up after making  
a connection.  
Network cable or  
Ethernet device  
attached to this port  
may be defective.  
• Verify that the switch and attached device are  
powered on.  
• Be sure an Ethernet cable is plugged into both the  
switch and attached device.  
• Verify that the proper cable type is used and its  
length does not exceed specified limits.  
• Check the network cable connections for possible  
defects. Replace the defective cable if necessary.  
VDSL LINK  
VDSL switch, cabling,  
VDSL, VDSL LINE, or  
VDSL Switch ports may  
be defective.  
• Verify that the VDSL switch and attached CPE are  
powered on.  
indicator does not  
light up after making  
a connection.  
• Be sure the RJ-21 cables are plugged into the  
VDSL switch, splitter, and the VDSL punch-down  
block/patch panel.  
• Verify that the cable length does not exceed  
specified limits.  
• Check the cable connections on the VDSL switch,  
splitter, punch-down block/patch panel, and the  
VDSL CPE for possible defects. Replace the  
defective cable if necessary.  
Power and Cooling Problems  
If the power indicator does not turn on when the power cord is plugged in, you may  
have a problem with the power outlet, power cord, or internal power supply.  
However, if the unit powers off after running for a while, check for loose power  
connections, power losses or surges at the power outlet, and verify that the fans on  
the unit are unobstructed and running prior to shutdown. If you still cannot isolate the  
problem, then the internal power supply may be defective. In this case, contact  
Accton Technical Support for assistance.  
A-1  
 
         
Troubleshooting  
Installation  
Verify that all system components have been properly installed. If one or more  
components appear to be malfunctioning (such as the power cord or network  
cabling), test them in an alternate environment where you are sure that all the other  
components are functioning properly.  
In-Band Access  
You can access the management agent in the switch from anywhere within the  
attached network using Telnet, a Web browser, or other network management  
software such as AccView. However, you must first configure the switch with a valid  
IP address, subnet mask, and default gateway. If you have trouble establishing a  
link to the management agent, check to see if you have a valid network connection.  
Then verify that you entered the correct IP address. Also, be sure the port through  
which you are connecting to the switch has not been disabled. If it has not been  
disabled, then check the network cabling that runs between your remote location  
and the switch.  
Note:  
You can configure the management agent to accept one to four simultaneous  
Telnet sessions. If the maximum number of sessions already exists, an  
additional Telnet connection will not be able to log into the system.  
A-2  
 
         
Appendix B: Cables  
Specifications  
.
Cable Types and Specifications  
Max. Length  
Cable  
Type  
Connector  
RJ-45  
10BASE-T  
Cat. 3, 4, 5 100-ohm UTP  
100 m (328 ft)  
100 m (328 ft)  
100BASE-TX Cat. 5 100-ohm UTP  
1000BASE-SX 50/125 or 62.5/125 micron core MMF  
1000BASE-LX 9/125 micron SMF  
RJ-45  
See the following table SC or ST  
5 km (3.12 miles)  
70 km (43.5 miles)  
SC or ST  
SC or ST  
MTRJ  
1000BASE-LH 9/125 micron SMF  
100BASE-FX 50/125 or 62.5/125 micron multimode fiber 2 km (1.24 miles)  
optic cable  
100BASE-FX 9/125 micron single-mode fiber optic cable 20 km (12.43 miles)  
MTRJ  
RJ-45  
1000BASE-T Cat. 5, 5e 100-ohm UTP  
100 m (328 ft)  
1000BASE-SX Fiber Specifications  
Fiber Diameter  
Fiber Bandwidth  
160 MHz/km  
200 MHz/km  
400 MHz/km  
500 MHz/km  
Maximum Cable Length  
62.5/125 micron MMF  
2-220 m (7-722 ft)  
2-275 m (7-902 ft)  
2-500 m (7-1641 ft)  
2-550 m (7-1805 ft)  
50/125 micron MMF  
Twisted-Pair Cable and Pin Assignments  
Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only twisted-pair  
cables with RJ-45 connectors that conform with FCC standards.  
Caution: Each wire pair must be attached to the RJ-45 connectors in a specific  
orientation. (See “Cabling Guidelines” on page 4-1 for an explanation.)  
Figure B-1 illustrates how the pins on the RJ-45 connector are numbered. Be sure to  
hold the connectors in the same orientation when attaching the wires to the pins.  
Figure B-1. RJ-45 Connector Pin Numbers  
B-1  
 
         
Cables  
10BASE-T/100BASE-TX Pin Assignments  
For 100BASE-TX/10BASE-T connections, a twisted-pair cable must have two pairs  
of wires. Each wire pair is identified by two different colors. For example, one wire  
might be red and the other, red with white stripes. Also, an RJ-45 connector must be  
attached to both ends of the cable.  
With 100BASE-TX/10BASE-T cable, pins 1 and 2 are used for transmitting data, and  
pins 3 and 6 for receiving data.  
RJ-45 Pin Assignments  
1
Pin Number  
Assignment  
Tx+  
1
2
3
6
Tx-  
Rx+  
Rx-  
1: The “+” and “-” signs represent the polarity of the wires  
that make up each wire pair.  
Because all ports on this switch support automatic MDI/MDI-X operation, you can  
use straight-through cables for all network connections to PCs or servers, or to other  
switches or hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of the  
cable, are connected straight through to pins 1, 2, 3 and 6 at the other end of the  
cable. The table below shows the 10BASE-T/100BASE-TX MDI and MDI-X port  
pinouts.  
Pin  
MDI-X Assignment  
Input Receive Data +  
MDI Assignment  
Output Transmit Data +  
Output Transmit Data -  
Input Receive Data +  
Input Receive Data -  
1
2
3
6
Input Receive Data -  
Output Transmit Data +  
Output Transmit Data -  
No other pins are used.  
Note: Auto-negotiation must be enabled for automatic MDI/MDI-X pinout configuration.  
B-2  
 
   
Twisted-Pair Cable and Pin Assignments  
1000BASE-T Pin Assignments  
1000BASE-T ports switch support automatic MDI/MDI-X operation, so you can use  
straight-through cables for all network connections to PCs or servers, or to other  
switches or hubs.  
The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports  
require that all four pairs of wires be connected. Note that for 1000BASE-T  
operation, all four pairs of wires are used for both transmit and receive.  
Use 100-ohm Category 5 or 5e unshielded twisted-pair (UTP) or shielded  
twisted-pair (STP) cable for 1000BASE-T connections. Also be sure that the length  
of any twisted-pair connection does not exceed 100 meters (328 feet)  
.
Pin  
1
MDI Signal Name  
MDI-X Signal Name  
Transmit Data plus (TD1+)  
Receive Data minus (RD1-)  
Transmit Data plus (TD2+)  
Transmit Data plus (TD3+)  
Receive Data minus (RD3-)  
Receive Data minus (RD2-)  
Transmit Data plus (TD4+)  
Receive Data minus (RD4-)  
Transmit Data plus (TD2 +)  
Receive Data minus (RD2-)  
Transmit Data plus (TD1+)  
Transmit Data plus (TD4+)  
Receive Data minus (RD4-)  
Receive Data minus (RD1-)  
Transmit Data plus (TD3+)  
Receive Data minus (RD3-)  
2
3
4
5
6
7
8
1000BASE-T Cable Requirements  
All Category 5 UTP cables that are used for 100BASE-TX connections should also  
work for 1000BASE-T, providing that all four wire pairs are connected. However, it is  
recommended that for all critical connections, or any new cable installations,  
Category 5e (enhanced Category 5) cable should be used. The Category 5e  
specification includes test parameters that are only recommendations for Category  
5. Therefore, the first step in preparing existing Category 5 cabling for running  
1000BASE-T is a simple test of the cable installation to be sure that it complies with  
the IEEE 802.3ab standards.  
Cable Testing for Existing Category 5 Cable  
Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk  
(NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in  
the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test  
parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These  
tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional  
Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”  
Note that when testing your cable installation, be sure to include all patch cables  
between switches and end devices.  
B-3  
 
           
Cables  
Adjusting Existing Category 5 Cabling to Run 1000BASE-T  
If your existing Category 5 installation does not meet one of the test parameters for  
1000BASE-T, there are basically three measures that can be applied to try and  
correct the problem:  
1. Replace any Category 5 patch cables with high-performance Category 5e  
cables.  
2. Reduce the number of connectors used in the link.  
3. Reconnect some of the connectors in the link.  
RJ-21 Port Pin Assignments  
The PBX/MDF connector is designed to aggregate 24 POTS/ISDN ports. Each wire  
pair must be attached to the RJ-21 connector in a specific orientation detailed below.  
The following tables shows the pin assignments.  
25  
1
female  
connector  
50  
26  
Pins  
1,26  
Circuit  
Pins  
Circuit  
Pins  
Circuit  
Pins  
Circuit  
1,Ring/Tip 7,32  
2,Ring/Tip 8,33  
3,Ring/Tip 9,34  
4,Ring/Tip 10,35  
5,Ring/Tip 11,36  
6,Ring/Tip 12,37  
7,Ring/Tip 13,38  
8,Ring/Tip 14,39  
9,Ring/Tip 15,40  
10,Ring/Tip 16,41  
11,Ring/Tip 17,42  
12,Ring/Tip 18,43  
13,Ring/Tip 19,44  
14,Ring/Tip 20,45  
15,Ring/Tip 21,46  
16,Ring/Tip 22,47  
17,Ring/Tip 23,48  
18,Ring/Tip 24,49  
19,Ring/Tip  
20,Ring/Tip  
21,Ring/Tip  
22,Ring/Tip  
23,Ring/Tip  
24,Ring/Tip  
2,27  
3,28  
4,29  
5,30  
6,31  
The VDSL Line connector is designed to aggregate 24 VDSL ports. The following  
table shows the pin assignments.  
Pins  
1,26  
Circuit  
Port 1  
Pins  
7,32  
Circuit  
Port 7  
Pins  
13,38  
14,39  
15,40  
16,41  
17,42  
18,43  
Circuit  
Port 13  
Pins  
19,44  
20,45  
21,46  
22,47  
23,48  
24,49  
Circuit  
Port 19  
2,27  
3,28  
4,29  
5,30  
6,31  
Port 2  
Port 3  
Port 4  
Port 5  
Port 6  
8,33  
Port 8  
Port 14  
Port 15  
Port 16  
Port 17  
Port 18  
Port 20  
Port 21  
Port 22  
Port 23  
Port 24  
9,34  
Port 9  
10,35  
11,36  
12,37  
Port 10  
Port 11  
Port 12  
B-4  
 
       
Console Port Pin Assignments  
Console Port Pin Assignments  
The DB-9 serial port on the switch’s front panel is used to connect to the switch for  
out-of-band console configuration. The on-board menu-driven configuration program  
can be accessed from a terminal or a PC running a terminal emulation program. The  
pin assignments used to connect to the serial port are provided in the following  
tables.  
Figure 2-1. DB-9 Console Port Pin Numbers  
DB-9 Port Pin Assignments  
EIA  
CCITT  
Description  
Switch’s  
DB9 DTE  
Pin #  
PC DB9  
DTE  
Pin #  
PC DB25  
DTE  
Pin #  
Circuit Signal  
BB  
104  
103  
102  
RxD (Received Data)  
TxD (Transmitted Data)  
SG (Signal Ground)  
2
2
3
5
3
2
7
BA  
AB  
3
5
No other pins are used.  
Console Port to 9-Pin DTE Port on PC  
Switch’s 9-Pin  
Serial Port  
Null Modem  
PC’s 9-Pin  
DTE Port  
2 RXD  
3 TXD  
<---------  
-----------  
-----------  
TXD  
------------  
---------->  
----------  
3 TXD  
RXD  
2 RXD  
5 SGND  
SGND  
5 SGND  
No other pins are used.  
Console to 25-Pin DTE Port on PC  
Switch’s 9-Pin  
Serial Port  
Null Modem  
PC’s 25-Pin  
DTE Port  
2 RXD  
3 TXD  
<---------  
-----------  
-----------  
TXD  
------------  
---------->  
----------  
2 TXD  
RXD  
3 RXD  
7 SGND  
5 SGND  
SGND  
No other pins are used.  
B-5  
 
           
Cables  
B-6  
 
Appendix C: Specifications  
VDSL Switch  
Model  
VDSL Switch-VS2512A  
Physical Characteristics  
VDSL Specificationss  
Supports evolving ETSI, ANSI and ITU standards  
Modulation: 4 to 256 QAM Frequency Division Duplexing  
Data Rate:Up to 15 Mbps symmetric  
Range: Up to 1525 m (5000 ft)  
Ports  
1 RJ-21 Port (contains 12 VDSL lines)  
1 Stacking Port Pair  
1 Slide-in Module Slot  
Interfaces  
VDSL Line: RJ-21 flat cable  
Stacking Ports: IEEE 1394 FireWire connectors  
Buffer Architecture  
16 Mbytes  
Switch Fabric Bandwidth  
9.8 Gbps  
Switching Database  
8K MAC address entries  
LEDs  
System: Power, Diag., Stacking, Master  
VDSL Port: Link, Activity  
Ethernet Port: Link/Speed, Activity  
Weight  
3.94 kg (8 lbs 11 oz)  
Size  
44.0 x 35.2 x 4.4 cm (17.4 x 13.9 x 1.7 in.)  
Temperature  
Operating: 0 to 50 °C (32 to 122 °F)  
Storage: -40 to 70 °C (-40 to 158 °F)  
C-1  
 
               
Specifications  
Humidity  
Operating: 5% to 90%  
AC Input  
100 to 240 V, 50 to 60 Hz  
Power Consumption  
40 Watts maximum  
Heat Dissipation  
137 BTU/hr maximum  
Maximum Current  
0.5 A @ 110 VAC  
0.25 A @ 240 VAC  
Switch Features  
Spanning Tree Protocol  
Forwarding Mode  
Store-and-forward  
Throughput  
Layer 2: wire speed  
Flow Control  
Full Duplex: IEEE 802.3x  
Half Duplex: Back pressure  
Broadcast Storm Suppression  
Traffic throttled above a critical threshold  
VLAN Support  
Up to 255 groups; port-based or with 802.1Q VLAN tagging  
Private VLAN feature  
GVRP for automatic VLAN learning  
Quality of Service  
Four levels of priority and Weighted Round Robin Queueing; Quality of Service  
based on DSCP, IP Precedence/TOS, TCP/UDP port number  
VDSL Bandwidth Control  
Rate Limiting  
C-2  
 
   
VDSL Switch  
Management Features  
In-Band Management  
Telnet, Web-based HTTP, or SNMP manager  
(AccView Network Management software provided free)  
Out-of-Band Management  
RS-232 DB-9 console port  
Software Loading  
TFTP in-band or XModem out-of-band  
MIB Support  
MIB-II (RFC1213), Interfaces Evolution MIB (RFC 2863), Ethernet-Like MIB  
(RFC 2665), Bridge MIB (RFC 1493), Extended Bridge MIB: P-bridge,  
Q-bridge (RFC2674), RMON MIB (RFC 2819), Entity MIB (RFC 2737),  
RADIUS authentication client MIB (RFC 2618), Accton’s private MIB  
RMON Support  
Groups 1, 2, 3, 9 (Statistics, History, Alarm, Event)  
Additional Features  
Port Trunks  
Port Mirroring  
Standards  
IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet,  
IEEE 802.1D Spanning Tree Protocol and traffic priorities,  
IEEE 802.1p priority tags, IEEE 802.1Q VLAN,  
IEEE 802.3ac VLAN tagging,  
IEEE 802.3x full-duplex flow control (ISO/IEC 8802-3)  
SNMP (RFC 1157), RMON (RFC 1757 groups 1,2,3,9), ARP (RFC 826),  
ICMP (RFC 792), IP (RFC 791, UDP (RFC 768), TCP (RFC 793),  
TFTP (RFC 783, TELNET (RFC 854-859), SMI (RFC 1155), Traps (RFC1215),  
HTML (RFC1866), HTTP (RFC 2068)  
Compliances  
CE Mark  
Emissions  
FCC Class A  
Industry Canada Class A  
EN55022 (CISPR 22) Class A  
EN 61000-3-2/3  
VCCI Class A  
C-3  
 
               
Specifications  
Immunity  
EN 61000-4-2/3/4/5/6/8/11  
Safety  
CSA/NRTL (CSA 22.2.950 & UL 1950)  
EN 60950 (TÜV/GS)  
CB (UEC60950)  
Warranty  
Limited Lifetime  
VDSL Splitter  
Models  
VM2524  
VM2548  
Ports  
VM2524: 1 RJ-21 Port (contains 24 VDSL lines)  
VM2548: 2 RJ-21 Ports (each port contains 24 VDSL lines)  
Network Interface  
RJ-21 flat cable  
Weight  
3 kg (6 lbs 10 oz)  
Size  
44.0 x 35.2 x 4.4 cm (17.4 x 13.9 x 1.7 in.)  
Temperature  
Operating: 0 to 50 °C (32 to 122 °F)  
Storage: -40 to 70 °C (-40 to 158 °F)  
Humidity  
Operating: 5% to 90%  
AC Input  
100 to 240 V, 50 to 60 Hz  
CE Mark  
Emissions  
FCC Class A  
Industry Canada Class A  
EN55022 (CISPR 22) Class A  
EN 61000-3-2/3  
VCCI Class A  
C-4  
 
             
Slide-in Modules  
Immunity  
EN 61000-4-2/3/4/5/6/8/11  
Safety  
CSA/NRTL (CSA 22.2.950 & UL 1950)  
EN60950 (TÜV/GS)  
CB (UEC60950)  
Warranty  
Limited Lifetime  
Slide-in Modules  
1000BASE-SX Extender Module  
Model  
VM2512A-SX-SC-M  
Ports  
1 1000BASE-SX SC-type port  
Network Interface  
SC connector, 50/125 or 62.5/125 micron multimode fiber cable  
Operating Mode  
Fixed at 1000 Mbps, full duplex  
Auto-negotiation of flow control  
Standards  
IEEE 802.3z Gigabit Ethernet  
1000BASE-LX Extender Module  
Model  
VM2512A-LX-SC-S  
Ports  
1 1000BASE-LX SC-type port  
Network Interface  
SC connector, 9/125 micron single-mode fiber cable  
Operating Mode  
Fixed at 1000 Mbps, full duplex  
Auto-negotiation of flow control  
Standards  
IEEE 802.3z Gigabit Ethernet  
C-5  
 
               
Specifications  
1000BASE-T Extender Module  
Model  
VM2512A-1GT  
Ports  
1 1000BASE-T RJ-45 port  
Network Interface  
RJ-45 connector, 100-ohm Category 5 or 5e twisted-pair cable (using all four wire  
pairs)  
Operating Mode  
1 Gbps, full duplex, autonegotiation of speed and flow control  
10/100 Mbps, full and half duplex, autonegotiation of speed, duplex mode, and flow  
control  
Standards  
IEEE 802.3ab  
100BASE-FX Extender Modules  
Models  
VS2512A-4FX-MTRJ-M  
VS2512A-4FX-MTRJ-S  
VM2512A-1FX-SC-M  
Ports  
VS2512A-4FX-MTRJ-M and VS2512A-4FX-MTRJ-S  
4 1000BASE-FX MT-RJ ports  
VM2512A-1FX-SC-M  
1 1000BASE-FX SC port  
Network Interface  
50/125 or 62.5/125 micron multimode fiber cable  
9/125 micron single-mode fiber cable  
Operating Mode  
Fixed at 100 Mbps, full duplex  
Auto-negotiation of flow control  
Standards  
IEEE 802.3u  
C-6  
 
       
Slide-in Modules  
10/100BASE-TX Extender Modules  
Models  
VS2512A-4TX  
VS2512A-1TX  
Ports  
VS2512A-4TX  
4 10/100BASE-T RJ-45 ports  
VS2512A-1TX  
1 10/100BASE-T RJ-45 port  
Network Interface  
RJ-45 connector, 100-ohm , UTP cable  
10BASE-T - Categories 3, 4, or 5  
100BASE-TX - Category 5  
Operating Mode  
10/100 Mbps, full and half duplex  
Auto-negotiation of speed and flow control  
Standards  
IEEE 802.3  
IEEE 802.3u  
IEEE 802.3x  
1000BASE-X GBIC Module  
Model  
VM2512A-1GX-GBIC  
Ports  
1 slot for GBIC transceivers  
Network Interface  
50/125 micron or 62.5/125 micron multimode fiber  
9/125 micron single-mode fiber cable  
Operating Mode  
Fixed at 1000 Mbps, full duplex  
Standards  
IEEE 802.3z  
C-7  
 
         
Specifications  
C-8  
 
Slide-in Modules  
C-9  
 
Specifications  
C-10  
 
Appendix D: Ordering Information  
VDSL Switch-VS2512A Products and Accessories  
Description  
Product Number  
VS2512A  
12-port VDSL switch with one media expansion slot  
24-port VDSL switch with one media expansion slot and one SFP slot  
24-port VDSL Splitter  
VS2524  
VM2524  
VM2548  
48-port VDSL Splitter  
ES2002-TS  
VS2524-1SX-SC-M  
VS2524-1LX-SC-S  
VDSL CPE  
Gigabit module with one 1000BASE-SX multimode fiber port (SC connector)  
Gigabit module with one 1000BASE-LX single-mode fiber port (SC  
connector)  
VS2524-1GT  
Gigabit module with one 1000BASE-T port (RJ-45 connector)  
Gigabit module with one slot for GBIC transceivers  
VS2524-1GX-GBIC  
VS2512A-4TX  
10/100-BASE-TX module with 4 RJ-45 ports  
VS2512A-1TX  
10/100-BASE-TX module with 1 RJ-45 port  
VS2512A-4FX-MTRJ-M  
VS2512A-4FX-MTRJ-S  
VS2512A-1FX-SC-M  
100BASE-FX module with 4 multimode fiber ports (MT-RJ connector)  
100BASE-FX module with 4 single-mode fiber ports (MT-RJ connector)  
100BASE-FX module with 1 multimode fiber ports (SC connector)  
D-1  
 
   
Ordering Information  
D-2  
 
Glossary  
10BASE-T  
IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5  
UTP cable.  
100BASE-FX  
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two strands of 50/125 or  
62.5/125 micron core fiber cable.  
100BASE-TX  
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5  
UTP cable.  
1000BASE-LX  
IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125, 62.5/125  
or 9/125 micron core fiber cable.  
1000BASE-LH  
Gigabit Ethernet over two strands of 9/125 micron core fiber cable.  
1000BASE-SX  
IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or  
62.5/125 micron core fiber cable.  
1000BASE-T  
IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5 or 5e  
twisted-pair cable (using all four wire pairs).  
Auto-Negotiation  
Signalling method allowing each node to select its optimum operational mode (e.g.,  
10 Mbps or 100 Mbps and half or full duplex) based on the capabilities of the node to  
which it is connected.  
Bandwidth  
The difference between the highest and lowest frequencies available for network  
signals. Also synonymous with wire speed, the actual speed of the data  
transmission along the cable.  
Collision  
A condition in which packets transmitted over the cable interfere with each other.  
Their interference makes both signals unintelligible.  
Glossary-1  
 
 
Glossary  
Collision Domain  
Single CSMA/CD LAN segment.  
Customer Premises Equipment (CPE)  
Terminating equipment, such as terminals, phones, routers and routers, supplied by  
the phone company, installed at customer sites, and connected to the phone  
company network.  
CSMA/CD  
CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication  
method employed by Ethernet, Fast Ethernet, or Gigabit Ethernet.  
End Station  
A workstation, server, or other device that does not forward traffic.  
Ethernet  
A network communication system developed and standardized by DEC, Intel, and  
Xerox, using baseband transmission, CSMA/CD access, logical bus topology, and  
coaxial cable. The successor IEEE 802.3 standard provides for integration into the  
OSI model and extends the physical layer and media with repeaters and  
implementations that operate on fiber, thin coax and twisted-pair cable.  
Fast Ethernet  
A 100 Mbps network communication system based on Ethernet and the CSMA/CD  
access method.  
Fiber to the Home (FTTH)  
A network where an optical fiber runs from the service provider to the subscriber's  
premises or home.  
Gigabit Ethernet  
A 1000 Mbps network communication system based on Ethernet and the CSMA/CD  
access method.  
Full Duplex  
Transmission method that allows two network devices to transmit and receive  
concurrently, effectively doubling the bandwidth of that link.  
IEEE  
Institute of Electrical and Electronic Engineers.  
IEEE 802.3  
Defines carrier sense multiple access with collision detection (CSMA/CD) access  
method and physical layer specifications.  
Glossary-2  
 
Glossary  
IEEE 802.3ab  
Defines CSMA/CD access method and physical layer specifications for  
1000BASE-T Fast Ethernet.  
IEEE 802.3u  
Defines CSMA/CD access method and physical layer specifications for  
100BASE-TX Fast Ethernet.  
IEEE 802.3x  
Defines Ethernet frame start/stop requests and timers used for flow control on  
full-duplex links.  
IEEE 802.3z  
Defines CSMA/CD access method and physical layer specifications for 1000BASE  
Gigabit Ethernet.  
LAN Segment  
Separate LAN or collision domain.  
LED  
Light emitting diode used for monitoring a device or network condition.  
Local Area Network (LAN)  
A group of interconnected computer and support devices.  
Main Distribution Frame (MDF)  
The termination equipment where outside telephone lines connect to a building or  
site.  
Media Access Control (MAC)  
A portion of the networking protocol that governs access to the transmission  
medium, facilitating the exchange of data between network nodes.  
Multiple Tenant Units (MTU)  
A building that contains more than a single tenant, such as an apartment block,  
office complex, or hotel.  
MIB  
An acronym for Management Information Base. It is a set of database objects that  
contains information about the device.  
Network Diameter  
Wire distance between two end stations in the same collision domain.  
Glossary-3  
 
Glossary  
Private Branch Exchange (PBX)  
A telephone exchange local to a particular organisation who use, rather than  
provide, telephone services.  
POTS  
Plain Old Telephone Service.  
Redundant Power Unit (RPU)  
A backup power supply that automatically takes over in case the primary power  
supply should fail.  
RJ-45 Connector  
A connector for twisted-pair wiring.  
Splitter  
A filter to separate DSL signals from POTS signals to prevent mutual interference.  
Switched Ports  
Ports that are on separate collision domains or LAN segments.  
Transmission Control Protocol/Internet Protocol (TCP/IP)  
Protocol suite that includes TCP as the primary transport protocol, and IP as the  
network layer protocol.  
UTP  
Unshielded twisted-pair cable.  
VDSL  
Very high data rate Digital Subscriber Line: A family of digital telecommunications  
protocols designed to allow high speed data communication at data rates from 12.9  
to 52.8 Mbps with corresponding maximum reach ranging from 4500 feet to 1000  
feet of 24 gauge twisted pair cable over the existing copper telephone lines.  
Virtual LAN (VLAN)  
A Virtual LAN is a collection of network nodes that share the same collision domain  
regardless of their physical location or connection point in the network. A VLAN  
serves as a logical workgroup with no physical barriers, allowing users to share  
information and resources as though located on the same LAN.  
Glossary-4  
 
Index  
full-duplex connectivity 2-1  
Numerics  
1000BASE-LX connections 4-3  
1000BASE-SX connections 4-3  
1000BASE-X connections 4-3  
100BASE-FX connections 4-3  
100BASE-LH connections 4-3  
100BASE-LX connections 4-3  
G
GVRP 1-3  
I
indicators, LED 1-7  
installation  
desktop or shelf mounting 3-4  
installing a GBIC transceiver 3-6  
installing optional modules 3-3  
port connections 4-1  
problems A-2  
A
accessories, ordering D-1  
adhesive feet, attaching 3-4  
applications  
Internet connections 2-2  
VLAN connections 2-3  
rack mounting 3-3  
wiring closet connections 4-2  
B
K
brackets, attaching 3-3  
broadcast storm control 1-3  
buffer size C-1  
key features 1-12  
L
laser safety 4-4  
LED indicators  
Power 1-7  
problems A-1  
limited warranty C-4, C-5  
C
cable  
specifications B-1  
cleaning fiber terminators 4-4  
compliances  
safety C-4, C-5  
M
console port 1-3  
pin assignments B-5  
contents of package 3-2  
cooling problems A-1  
cord sets, international 3-7  
management  
agent 1-3  
features 1-13, C-3  
out-of-band 1-3  
SNMP 1-3  
Web-based 1-3  
MIB support C-3  
modules  
D
desktop mounting 3-4  
10/100BASE-TX 1-4, 1-9, 1-10, C-7  
1000BASE-LX 1-4, 1-8, C-5  
1000BASE-SX 1-4, 1-8, C-5  
1000BASE-T 1-4, 1-9, C-6, C-7  
1000BASE-X GBIC 1-4, 1-8  
100BASE-FX 1-4, 1-10, C-6  
mounting the switch  
in a rack 3-3  
E
equipment checklist 3-2  
Extender C-7  
F
features C-2  
management 1-12, 1-13  
system 1-12  
fiber cables 4-3  
front panel of splitter 1-6  
front panel of switch 1-5, 1-6  
on a desktop or shelf 3-4  
MT-RJ port connections 4-3  
multicast switching 1-3  
Index-1  
 
 
Index  
IGMP Snooping 1-3  
multimode and single-mode fiber optic  
cables 4-3  
Internet connections 2-2  
remote connections 2-2  
SC port connections 4-3  
screws for rack mounting 3-2  
SC-ST Converter 4-3, 4-4  
serial port 1-3  
site selelction 3-1  
SNMP agent 1-3  
specifications  
multimode fiber optic cables 4-3  
N
network  
connections 4-1, 4-3  
null-modem cable 1-3  
10/100BASE-TX module C-7  
1000BASE-LX C-5  
1000BASE-SX C-5  
1000BASE-T module C-6, C-7  
1000BASE-X GBIC module C-7  
100BASE-FX module C-6  
compliances C-3  
environmental C-1, C-4  
management features C-3  
physical C-1  
slide-in module C-5  
VDSL C-1  
VDSL splitter C-4  
VDSL switch C-1  
standards  
O
optional  
modules, installation 3-3  
ordering information D-1  
out-of-band management 1-3  
P
package contents 3-2  
pin assignment  
RJ21 B-4  
pin assignments B-1  
1000BASE-T B-3  
10BASE-T/100BASE-TX B-2  
console port B-5  
DB-9 B-5  
port saturation 1-3  
port-based VLANs 2-3  
ports, connecting to 4-1, 4-3  
power, connecting to 3-7  
priority queues 1-4  
problems, troubleshooting A-1  
compliance C-3  
IEEE C-3  
status LEDs 1-7  
switch architecture 1-2  
switching, introduction to 2-1  
T
tags  
Q
QoS 1-3  
priority 1-4  
VLAN 2-3  
Telnet A-2  
R
rack mounting 3-3  
rear panel of splitter 1-6  
rear panel of switch 1-5, 1-6  
Remote 2-2  
traffic priority 1-4  
troubleshooting  
in-band access A-2  
power and cooling problems A-1  
switch indicators A-1  
twisted-pair connections 4-1  
RJ-45 ports  
connections 4-1  
pinouts B-3  
RMON 1-3  
V
routing applications 2-4  
RS-232 port 1-3  
rubber foot pads, attaching 3-4  
VLANs 1-3, 2-3  
tagging 2-3  
W
S
warranty C-4, C-5  
sample applications  
Index-2  
 
Index  
Weighted Round Robin Queuing 1-4  
Web-based management 1-3  
Index-3  
 
Index  
Index-4  
 
 
VS2412A  
VM2524, VM2548  
E072002-R01  
150000010100A  
 

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