Transition Networks Switch SM24 100SFP AH User Manual

SM24-100SFP-AH  
Fast Ethernet Switch  
Installation Guide  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Installation Guide  
Fast Ethernet Switch  
Layer 2 Workgroup Switch  
with 24 100BASE-BX (SFP) Ports, 2 1000BASE-T (RJ-45)  
and 2 Combination Gigabit (RJ-45/SFP) Ports  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SM24-100SFP-AH  
E082008-DT-R01  
150200069500A  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Compliances and Safety Warnings  
FCC - Class A  
This equipment has been tested and found to comply with the limits for a Class A digital  
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide  
reasonable protection against harmful interference when the equipment is operated in a  
commercial environment. This equipment generates, uses, and can radiate radio  
frequency energy and, if not installed and used in accordance with the instruction manual,  
may cause harmful interference to radio communications. Operation of this equipment in  
a residential area is likely to cause harmful interference in which case the user will be  
required to correct the interference at his own expense.  
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 better  
for 10 Mbps connections, Category 5 or better for 100 Mbps connections, Category 5, 5e,  
or 6 for 1000 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.  
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)  
i
Download from Www.Somanuals.com. All Manuals Search And Download.  
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 60950-1:2001  
ii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
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.  
Please read the following safety information carefully before  
installing the switch:  
WARNING: Installation and removal of the unit must be carried out by qualified personnel  
only.  
The unit must be connected to an earthed (grounded) outlet to comply with international  
safety standards.  
Do not connect the unit to an A.C. outlet (power supply) without an earth (ground)  
connection.  
The appliance coupler (the connector to the unit and not the wall plug) must have a  
configuration for mating with an EN 60320/IEC 320 appliance inlet.  
The socket outlet must be near to the unit and easily accessible. You can only remove  
power from the unit by disconnecting the power cord from the outlet.  
• This unit operates under SELV (Safety Extra Low Voltage) conditions according to  
IEC 60950. The conditions are only maintained if the equipment to which it is connected  
also operates under SELV conditions.  
France and Peru only  
This unit cannot be powered from IT supplies. If your supplies are of IT type, this unit  
must be powered by 230 V (2P+T) via an isolation transformer ratio 1:1, with the  
secondary connection point labelled Neutral, connected directly to earth (ground).  
Impédance à la terre  
iii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Power Cord Set  
U.S.A. and Canada  
The cord set must be UL-approved and CSA certified.  
The minimum specifications for the flexible cord are:  
- No. 18 AWG - not longer than 2 meters, or 16 AWG.  
- Type SV or SJ  
- 3-conductor  
The cord set must have a rated current capacity of at least 10 A  
The attachment plug must be an earth-grounding type with NEMA  
5-15P (15 A, 125 V) or NEMA 6-15P (15 A, 250 V) configuration.  
Denmark  
The supply plug must comply with Section 107-2-D1, Standard  
DK2-1a or DK2-5a.  
Switzerland  
U.K.  
The supply plug must comply with SEV/ASE 1011.  
The supply plug must comply with BS1363 (3-pin 13 A) and be fitted  
with a 5 A fuse which complies with BS1362.  
The mains cord must be <HAR> or <BASEC> marked and be of type  
HO3VVF3GO.75 (minimum).  
Europe  
The supply plug must comply with CEE7/7 (“SCHUKO”).  
The mains cord must be <HAR> or <BASEC> marked and be of type  
HO3VVF3GO.75 (minimum).  
IEC-320 socket.  
Veuillez lire à fond l'information de la sécurité suivante avant  
d'installer le Switch:  
AVERTISSEMENT: L’installation et la dépose de ce groupe doivent être confiés à un  
personnel qualifié.  
Ne branchez pas votre appareil sur une prise secteur (alimentation électrique) lorsqu'il  
n'y a pas de connexion de mise à la terre (mise à la masse).  
Vous devez raccorder ce groupe à une sortie mise à la terre (mise à la masse) afin de  
respecter les normes internationales de sécurité.  
Le coupleur d’appareil (le connecteur du groupe et non pas la prise murale) doit  
respecter une configuration qui permet un branchement sur une entrée d’appareil EN  
60320/IEC 320.  
La prise secteur doit se trouver à proximité de l’appareil et son accès doit être facile.  
Vous ne pouvez mettre l’appareil hors circuit qu’en débranchant son cordon électrique  
au niveau de cette prise.  
L’appareil fonctionne à une tension extrêmement basse de sécurité qui est conforme à  
la norme IEC 60950. Ces conditions ne sont maintenues que si l’équipement auquel il  
est raccordé fonctionne dans les mêmes conditions.  
iv  
Download from Www.Somanuals.com. All Manuals Search And Download.  
France et Pérou uniquement:  
Ce groupe ne peut pas être alimenté par un dispositif à impédance à la terre. Si vos  
alimentations sont du type impédance à la terre, ce groupe doit être alimenté par une  
tension de 230 V (2 P+T) par le biais d’un transformateur d’isolement à rapport 1:1, avec  
un point secondaire de connexion portant l’appellation Neutre et avec raccordement  
direct à la terre (masse).  
Cordon électrique - Il doit être agréé dans le pays d’utilisation  
Etats-Unis et  
Canada:  
Le cordon doit avoir reçu l’homologation des UL et un certificat de la  
CSA.  
Les spe'cifications minimales pour un cable flexible sont AWG No.  
18, ouAWG No. 16 pour un cable de longueur infe'rieure a` 2 me'tres.  
- type SV ou SJ  
- 3 conducteurs  
Le cordon doit être en mesure d’acheminer un courant nominal d’au  
moins 10 A.  
La prise femelle de branchement doit être du type à mise à la terre  
(mise à la masse) et respecter la configuration NEMA 5-15P (15 A,  
125 V) ou NEMA 6-15P (15 A, 250 V).  
Danemark:  
La prise mâle d’alimentation doit respecter la section 107-2 D1 de la  
norme DK2 1a ou DK2 5a.  
Suisse:  
Europe  
La prise mâle d’alimentation doit respecter la norme SEV/ASE 1011.  
La prise secteur doit être conforme aux normes CEE 7/7 (“SCHUKO”)  
LE cordon secteur doit porter la mention <HAR> ou <BASEC> et doit  
être de type HO3VVF3GO.75 (minimum).  
Bitte unbedingt vor dem Einbauen des Switches die folgenden  
Sicherheitsanweisungen durchlesen:  
WARNUNG: Die Installation und der Ausbau des Geräts darf nur durch Fachpersonal  
erfolgen.  
Das Gerät sollte nicht an eine ungeerdete Wechselstromsteckdose angeschlossen  
werden.  
Das Gerät muß an eine geerdete Steckdose angeschlossen werden, welche die  
internationalen Sicherheitsnormen erfüllt.  
Der Gerätestecker (der Anschluß an das Gerät, nicht der Wandsteckdosenstecker) muß  
einen gemäß EN 60320/IEC 320 konfigurierten Geräteeingang haben.  
Die Netzsteckdose muß in der Nähe des Geräts und leicht zugänglich sein. Die  
Stromversorgung des Geräts kann nur durch Herausziehen des Gerätenetzkabels aus  
der Netzsteckdose unterbrochen werden.  
Der Betrieb dieses Geräts erfolgt unter den SELV-Bedingungen  
(Sicherheitskleinstspannung) gemäß IEC 60950. Diese Bedingungen sind nur gegeben,  
wenn auch die an das Gerät angeschlossenen Geräte unter SELV-Bedingungen  
betrieben werden.  
v
Download from Www.Somanuals.com. All Manuals Search And Download.  
Stromkabel. Dies muss von dem Land, in dem es benutzt wird geprüft werden:  
Schweiz  
Dieser Stromstecker muß die SEV/ASE 1011Bestimmungen einhalt-  
en.  
Europe  
Das Netzkabel muß vom Typ HO3VVF3GO.75 (Mindestanforderung)  
sein und die Aufschrift <HAR> oder <BASEC> tragen.  
Der Netzstecker muß die Norm CEE 7/7 erfüllen (”SCHUKO”).  
Warnings and Cautionary Messages  
Warning: This product does not contain any serviceable user parts.  
Warning: Installation and removal of the unit must be carried out by qualified  
personnel only.  
Warning: When connecting this device 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.  
Warning: 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.  
Caution: Do not plug a phone jack connector in the RJ-45 port. This may damage this  
device.  
Caution: Use only twisted-pair cables with RJ-45 connectors that conform to FCC  
standards.  
Caution: Wear an anti-static wrist strap or take other suitable measures to prevent  
electrostatic discharge when handling this equipment.  
vi  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Environmental Statement  
The manufacturer of this product endeavours to sustain an environmentally-friendly policy  
throughout the entire production process. This is achieved though the following means:  
Adherence to national legislation and regulations on environmental production  
standards.  
Conservation of operational resources.  
Waste reduction and safe disposal of all harmful un-recyclable by-products.  
Recycling of all reusable waste content.  
Design of products to maximize recyclables at the end of the product’s life span.  
Continual monitoring of safety standards.  
End of Product Life Span  
This product is manufactured in such a way as to allow for the recovery and disposal of all  
included electrical components once the product has reached the end of its life.  
Manufacturing Materials  
There are no hazardous nor ozone-depleting materials in this product.  
Documentation  
All printed documentation for this product uses biodegradable paper that originates from  
sustained and managed forests. The inks used in the printing process are non-toxic.  
vii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
About This Guide  
Purpose  
This guide details the hardware features of this device, including the physical and  
performance-related characteristics, and how to install it.  
Audience  
The guide is intended for use by network administrators who are responsible for installing  
and setting up network equipment; consequently, it assumes a basic working knowledge  
of LANs (Local Area Networks).  
Conventions  
The following conventions are used throughout this guide to show information:  
Note: Emphasizes important information or calls your attention to related features or  
instructions.  
Caution: Alerts you to a potential hazard that could cause loss of data, or damage the  
system or equipment.  
Warning: Alerts you to a potential hazard that could cause personal injury.  
Revision History  
This section summarizes the changes in each revision of this guide.  
August 2008 Revision  
This is the first revision of this guide.  
viii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Contents  
Chapter 1: Introduction  
Overview  
1-2  
1-2  
Switch Architecture  
Network Management Options  
Description of Hardware  
SFP Slots  
Console Port  
Port and System Status LEDs  
Power Supply Sockets  
Features and Benefits  
Connectivity  
Expandability  
Performance  
Management  
Chapter 2: Network Planning  
Introduction to Switching  
Application Examples  
Collapsed Backbone  
Network Aggregation Plan  
Remote Connection with Fiber Cable  
Making VLAN Connections  
Application Notes  
Chapter 3: Installing the Switch  
Selecting a Site  
Equipment Checklist  
Package Contents  
Optional Rack-Mounting Equipment  
Mounting  
3-1  
3-1  
3-2  
3-2  
3-2  
3-3  
3-4  
3-5  
3-5  
3-6  
Rack Mounting  
Desktop or Shelf Mounting  
Installing an Optional SFP Transceiver  
Connecting to a Power Source  
Connecting to the Console Port  
Wiring Map for Serial Cable  
ix  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Contents  
Chapter 4: Making Network Connections  
Connecting Network Devices  
Twisted-Pair Devices  
Cabling Guidelines  
Connecting to PCs, Servers, Hubs and Switches  
Network Wiring Connections  
4-1  
4-1  
4-5  
4-6  
Fiber Optic SFP Devices  
Connectivity Rules  
1000BASE-T Cable Requirements  
100 Mbps Fast Ethernet Collision Domain  
10 Mbps Ethernet Collision Domain  
Cable Labeling and Connection Records  
Appendix A: Troubleshooting  
A-1  
Diagnosing Switch Indicators  
Diagnosing Power Problems with the LEDs  
Power and Cooling Problems  
Installation  
A-2  
A-2  
In-Band Access  
Appendix B: Cables  
B-1  
Twisted-Pair Cable and Pin Assignments  
Straight-Through Wiring  
Crossover Wiring  
1000BASE-T Pin Assignments  
B-1  
Appendix C: Supported SFP Transceivers  
C-1  
Appendix D: Specifications  
D-1  
Switch Features  
Management Features  
Standards  
D-2  
D-2  
D-3  
D-3  
Compliances  
Glossary  
Index  
x
Download from Www.Somanuals.com. All Manuals Search And Download.  
Tables  
Table 1-1  
Table 1-2  
Table 3-1  
System Status LEDs  
Serial Cable Wiring  
4-4  
4-4  
4-4  
4-5  
4-5  
4-5  
A-1  
A-1  
B-2  
B-3  
Table 4-1. Maximum 1000BASE-T Gigabit Ethernet Cable Length  
Table 4-2. Maximum 1000BASE-SX Gigabit Ethernet Cable Length  
Table 4-3. Maximum 1000BASE-LX Gigabit Ethernet Cable Length  
Table 4-4. Maximum 1000BASE-LH Gigabit Ethernet Cable Length  
Table 4-5. Maximum Fast Ethernet Cable Length  
Table 4-6. Maximum Ethernet Cable Length  
Table A-1. Troubleshooting Chart  
Table A-2. Pwr/BPS LEDs  
Table B-1. 10/100BASE-TX MDI and MDI-X Port Pinouts  
Table B-2. 1000BASE-T MDI and MDI-X Port Pinouts  
xi  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Figures  
Figure 1-1. SM24-100SFP-AH Front and Rear Panels  
Figure 1-2. SM24-100SFP-AH Port Status LEDs  
Figure 1-3. System Status LED  
Figure 1-4. Power Supply Sockets  
Figure 2-1. Collapsed Backbone  
3-3  
3-4  
3-5  
3-5  
4-1  
4-2  
4-3  
B-1  
B-2  
B-3  
Figure 2-2. Network Aggregation Plan  
Figure 2-3. Remote Connection with Fiber Cable  
Figure 2-4. Making VLAN Connections  
Figure 3-1. Attaching the Brackets  
Figure 3-2. Installing the Switch in a Rack  
Figure 3-3. Attaching the Adhesive Feet  
Figure 3-4. Inserting an SFP Transceiver into a Slot  
Figure 3-5. Power Sockets  
Figure 3-6. Serial Port (RJ-45) Pin-Out  
Figure 4-1. Making Twisted-Pair Connections  
Figure 4-2. Network Wiring Connections  
Figure 4-3. Making Fiber Port Connections  
Figure B-1. RJ-45 Connector Pin Numbers  
Figure B-2. Straight-through Wiring  
Figure B-3. Crossover Wiring  
xii  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Chapter 1: Introduction  
Overview  
The SM24-100SFP-AH is an intelligent switch with 24 100BASE SFP transceiver  
1
slots, two Gigabit combination ports that are comprised of a RJ-45 port and an SFP  
transceiver slot and 2 Gigabit stacking ports. There is also an SNMP-based  
management agent embedded on the main board. This agent supports both in-band  
and out-of-band access for managing the switch.  
This switch provides a broad range of powerful features for Layer 2 switching,  
delivering reliability and consistent performance for your network traffic. It brings  
order to poorly performing networks by segregating them into separate broadcast  
domains with IEEE 802.1Q compliant VLANs, and empowers multimedia  
applications with multicast switching and CoS services.  
Port Status Indicators  
Console Port  
SM24-100SFP-AH  
24 100BASE-X SFP Ports 10/100/1000 RJ-45 Ports Gigabit Combo Ports  
2
2
System Indicators  
Combination Gigabit Ports  
100BASE SFP Slots  
Power Socket  
BPS  
100/115/ 220/230  
1.0/1.0/0.5/0.5  
50/60 HZ  
V
A
DC IN  
12V  
.5A(4,5A)  
4
Figure 1-1. SM24-100SFP-AH Front and Rear Panels  
1. RJ-45 ports shared with a SFP transceiver slots. If an SFP transceiver is plugged in, the  
corresponding RJ-45 port is disabled.  
1-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
Introduction  
1
Switch Architecture  
The SM24-100SFP-AH switch 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.  
This switch uses store-and-forward switching to ensure maximum data integrity.  
With store-and-forward switching, the entire packet must be received into a buffer  
and checked for validity before being forwarded. This prevents errors from being  
propagated throughout the network.  
Network Management Options  
The SM24-100SFP-AH contains a comprehensive array of LEDs for “at-a-glance”  
monitoring of network and port status. It also includes a management agent that  
allows you to configure or monitor the switch using its embedded management  
software, or via SNMP applications. To manage a switch, you can make a direct  
connection to the RJ-45 console port (out-of-band), or you can manage it through a  
network connection (in-band) using Telnet, the on-board Web agent, or  
Windows-based network management software.  
For a detailed description of the switch’s advanced features, refer to the  
Management Guide.  
Description of Hardware  
SFP Slots  
The SM24-100SFP-AH switch contains 24 Small Form Factor Pluggable (SFP)  
transceiver slots that operate at 100 Mbps full duplex. These slots support 100 Mbps  
SFP Fast Ethernet transceivers. The supported transceiver types are listed below:  
SFP 100FX Multimode LC and optionally MTRJ  
SFP 100FX Single Mode LC  
SFP 100BX Single Mode LC Bidirectional Single Fiber (1550 nm / 1310 nm)  
This switch also has two Gigabit SFP transceiver slots shared with two RJ-45 ports  
(Ports 26 and 28). In its default configuration, if an SFP transceiver (purchased  
separately) is installed in a slot and has a valid link on its port, the associated RJ-45  
port is disabled and cannot be used. The switch can also be configured to force the  
use of an RJ-45 port or SFP slot, as required.  
Console Port  
The RJ-45 serial port on the switch’s front panel is used to connect to the switch for  
out-of-band console configuration. The on-board configuration program can be  
accessed from a terminal or a PC running a terminal emulation program.  
1-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
Description of Hardware  
1
Port and System Status LEDs  
The LEDs, which are located on the front panel for easy viewing, are shown below  
and described in the following table.  
Port Status LEDs  
Combination Gigabit Port Status LEDs  
Figure 1-2. SM24-100SFP-AH Port Status LEDs  
Table 1-1 SM24-100SFP-AH Port Status LEDs  
LED  
Condition  
Status  
100X SFP Ports  
1-24  
(Link/Activity)  
Blinking Green  
Off  
The port has a valid 100 Mbps link. Blinking indicates  
activity.  
There is no valid link on the port.  
Combination Gigabit Ports  
26-28  
(Link/Activity)  
On/Blinking  
Green  
The port has a valid 10/100/1000 Mbps link. Blinking  
indicates activity.  
Off  
There is no valid link on the port.  
1000BASE-T Ports  
1000M  
On/Blinking  
Green  
The port has a valid 1000 Mbps link. Blinking indicates  
activity.  
Off  
There is no valid 1000 Mbps link on the port.  
1-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Introduction  
1
System Status LEDs  
Figure 1-3. System Status LED  
Table 1-2 System Status LEDs  
Status  
LED  
Condition  
On Green  
On Amber  
Off  
Pwr  
(Power)  
Internal power is operating normally.  
Internal power supply has failed.  
Power off or failure.  
BPS  
On Green  
On Yellow  
The backup power supply is operating normally.  
The backup power supply is plugged in but faulty, such as a  
thermal or fan failure.  
Off  
No backup power supply is connected.  
OK (Diagnostic) On Green  
Blinking Green  
On Amber  
System self-diagnostic test successfully completed.  
System self-diagnostic test in progress.  
System self-diagnostic test has failed.  
1-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
Features and Benefits  
1
Power Supply Sockets  
There is one standard power socket on the rear panel of each switch for the AC  
power cord.  
Backup Power Supply  
Power Socket  
BPS  
100/115/ 220/230  
1.0/1.0/0.5/0.5  
50/60 HZ  
V
A
DC IN  
12V 4  
.5A(4,5A)  
Figure 1-4. Power Supply Sockets  
Note: There is no BPS currently supported by this switch. The RPS100W will be  
supported in a future release.  
Features and Benefits  
Connectivity  
24 100BASE-BX / 100BASE-FX SFP transceiver slots  
Auto-negotiation enables each RJ-45 port to automatically select the optimum  
speed (10, 100, or 1000 Mbps), and the communication mode (half or full duplex)  
Unshielded (UTP) cable supported on all RJ-45 ports: Category 3, 4 or 5 for  
10 Mbps connections, Category 5 for 100 Mbps connections, and Category 5 or  
better for 1000 Mbps connections  
IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet compliance ensures  
compatibility with standards-based hubs, network cards and switches from any  
vendor  
Expandability  
• Two Gigabit Small Form Factor Pluggable (SFP) transceiver slots (shared with  
1000BASE-T ports)  
• Supports 1000BASE-SX and 1000BASE-LX, 1000BASE-LH and other  
SFP-compatible transceivers  
Performance  
Transparent bridging  
Switching table with a total of 8K MAC address entries  
Provides store-and-forward switching  
Supports wire-speed filtering and forwarding  
Broadcast storm control  
1-5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
               
Introduction  
1
Management  
“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  
1-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
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, power user, or hub) can be attached directly to a  
switched port. And, by using full-duplex mode, the bandwidth of the dedicated  
segment can be doubled to maximize throughput.  
When networks are based on repeater (hub) technology, the distance between end  
stations is limited by a maximum hop count. However, a switch turns the hop count  
back to zero. So subdividing the network into smaller and more manageable  
segments, and linking them to the larger network by means of a switch, removes this  
limitation.  
A switch can be easily configured in any Ethernet, Fast Ethernet, or Gigabit Ethernet  
network to significantly boost bandwidth while using conventional cabling and  
network cards.  
2-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
Network Planning  
2
Application Examples  
The SM24-100SFP-AH is not only designed to segment your network, but also to  
provide a wide range of options in setting up network connections. Some typical  
applications are described in the following pages.  
Collapsed Backbone  
The SM24-100SFP-AH is an excellent choice for mixed Ethernet, Fast Ethernet, and  
Gigabit Ethernet installations where significant growth is expected in the near future.  
In a basic stand-alone configuration, it can provide direct full-duplex connections to  
workstations or servers. When the time comes for further expansion, just connect to  
another switch using one of the SFP ports or a Gigabit Ethernet port on a plug-in  
SFP transceiver.  
In the figure below, the switch is operating as a collapsed backbone for a small LAN.  
It is providing dedicated 100 Mbps full-duplex connections to workstations and  
1000 Mbps full-duplex connections to power users and servers.  
SM24-100SFP-AH  
2
24 100BASE-X SFP Ports  
10/100/1000 RJ-45 Ports  
2
Gigabit Combo Ports  
Server  
1000 Mbps  
Full Duplex  
Workstation  
1000 Mbps  
Full Duplex  
Workstation Workstation Workstation  
100 Mbps 100 Mbps 100 Mbps  
Full Duplex Full Duplex Full Duplex  
Figure 2-1. Collapsed Backbone  
2-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
Application Examples  
2
Network Aggregation Plan  
With 24 parallel bridging ports (i.e., 24 distinct collision domains), the switch can  
collapse a complex network down into a single efficient bridged node, increasing  
overall bandwidth and throughput.  
In the figure below, the SFP ports on the switch are providing 100 Mbps connectivity  
through layer 2 switches. In addition, the switch is also connecting several servers at  
1000 Mbps.  
SM24-100SFP-AH  
24 100BASE-X SFP Ports  
2
10/100/1000 RJ-45 Ports  
2
Gigabit Combo Ports  
Server Farm  
SM24-100SFP-AH  
24 100BASE-X SFP Ports 10/100/1000 RJ-45 Ports  
SM24-100SFP-AH  
24 100BASE-X SFP Ports 10/100/1000 RJ-45 Ports Gigabit Combo Ports  
2
2
G
i
g
a
b
i
t
C
o
m
b
o
P
o
r
t
s
2
2
10/100 Mbps Segments  
...  
...  
Figure 2-2. Network Aggregation Plan  
2-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Network Planning  
2
Remote Connection with Fiber Cable  
Fiber optic technology allows for longer cabling than any other media type. A  
1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a  
1000BASE-LX (SMF) link up to 5 km, and a 1000BASE-LH link up to 70 km. This  
allows the switch to serve as a collapsed backbone, providing direct connectivity for  
a widespread LAN.  
A 1000BASE-SX SFP transceiver can be used for a high-speed connection between  
floors in the same building, a 1000BASE-LX SFP transciever can be used to  
connect to other buildings in a campus setting, and a 1000BASE-LH SFP  
transceiver can be used for a long-haul connection to a remote site.  
The figure below illustrates the switch connecting multiple segments with fiber cable.  
Headquarters  
SM24-100SFP-AH  
24 100BASE-X SFP Ports  
2
10/100/1000 RJ-45 Ports  
2
Gigabit Combo Ports  
1000BASE-SX MMF  
(550 meters)  
1000BASE-LX SMF  
(5 kilometers)  
Remote Switch  
Remote Switch  
SM24-100SFP-AH  
24 100BASE-X SFP Ports  
2
1
0
/
1
0
0
/
1
0
0
0
R
J
-
4
5
P
o
r
t
s
2
G
i
g
a
b
i
t
C
o
m
b
o
P
o
r
t
s
SM24-100SFP-AH  
2
2
4
1
0
0
B
A
S
E
-
X
S
F
P
P
o
r
t
s
1
0
/
1
0
0
/
1
0
0
0
R
J
-
4
5
P
o
r
t
s
2
G
i
g
a
b
i
t
C
o
m
b
o
P
o
r
t
s
10/100/1000 Mbps Segments  
...  
...  
Figure 2-3. Remote Connection with Fiber Cable  
2-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Application Examples  
2
Making VLAN Connections  
The SM24-100SFP-AH supports VLANs which can be used to organize any group  
of network nodes into separate broadcast domains. VLANs confine broadcast traffic  
to the originating group, and can eliminate broadcast storms in large networks. This  
provides a more secure and cleaner network environment.  
VLANs can be based on untagged port groups, or traffic can be explicitly tagged to  
identify the VLAN group to which it belongs. Untagged VLANs can be used for small  
networks attached to a single switch. However, tagged VLANs should be used for  
larger networks, and all the VLANs assigned to the inter-switch links.  
This switch also supports multiple spanning trees which allow VLANs groups to  
maintain a more stable path between all VLAN members. This can reduce the  
overall amount of protocol traffic crossing the network, and provide a shorter  
reconfiguration time if any link in the spanning tree fails.  
R&D  
VLAN 1  
SM24-100SFP-AH  
24 100BASE-X SFP Ports  
2
10/100/1000 RJ-45 Ports  
2
Gigabit Combo Ports  
Tagged  
Ports  
Tagged Port  
Untagged Ports  
VLAN  
aware  
switch  
VLAN  
unaware  
switch  
Finance  
VLAN 2  
Testing  
R&D  
Marketing  
Finance  
Testing  
VLAN 3  
VLAN 4  
VLAN 1  
VLAN 2  
VLAN 3  
Figure 2-4. Making VLAN Connections  
Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, use  
untagged ports.  
2-5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Network Planning  
2
Application Notes  
1. Full-duplex operation only applies to point-to-point access (such as when a  
switch is attached to a workstation, server or another switch). When the switch  
is connected to a hub, both devices must operate in half-duplex mode.  
2. Avoid using flow control on a port connected to a hub unless it is actually  
required to solve a problem. Otherwise back pressure jamming signals may  
degrade overall performance for the segment attached to the hub.  
3. For fiber optic cable lengths, see “Supported SFP Transceivers” on page C-1.  
2-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Chapter 3: Installing the Switch  
Selecting a Site  
Switch units can be mounted in a standard 19-inch equipment rack or on a flat  
surface. Be sure to follow the guidelines below when choosing a location.  
The site should:  
be at the center of all the devices you want to link and near a power outlet.  
be able to maintain its temperature within 0 to 45 °C (32 to 113 °F) and its  
humidity within 10% to 90%, non-condensing  
provide adequate space (approximately two inches) on all sides for proper air  
flow  
be accessible for installing, cabling and maintaining the devices  
allow the status LEDs to be clearly visible  
Make sure twisted-pair cable is always routed away from power lines, fluorescent  
lighting fixtures and other sources of electrical interference, such as radios and  
transmitters.  
• Make sure that a separate grounded power outlet that provides 100 to 240 VAC,  
50 to 60 Hz, is within 2.44 m (8 feet) of each device and is powered from an  
independent circuit breaker. As with any equipment, using a filter or surge  
suppressor is recommended.  
Equipment Checklist  
After unpacking the switch, check the contents to be sure you have received all the  
components. Then, before beginning the installation, be sure you have all other  
necessary installation equipment.  
Package Contents  
SM24-100SFP-AH Fast Ethernet Switch  
Four adhesive foot pads  
Bracket Mounting Kit containing two brackets and eight screws for attaching the  
brackets to the switch  
Power Cord  
RS-232 console cable  
This Installation Guide  
Management Guide CD  
3-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                     
Installing the Switch  
3
Optional Rack-Mounting Equipment  
If you plan to rack-mount the switch, 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 units can be mounted in a standard 19-inch equipment rack or on a  
desktop or shelf. Mounting instructions for each type of site follow.  
Rack Mounting  
Before rack mounting the switch, pay particular attention to the following factors:  
Temperature: Since the temperature within a rack assembly may be higher than  
the ambient room temperature, check that the rack-environment temperature is  
within the specified operating temperature range. (See page D-2.)  
Mechanical Loading: Do not place any equipment on top of a rack-mounted unit.  
Circuit Overloading: Be sure that the supply circuit to the rack assembly is not  
overloaded.  
Grounding: Rack-mounted equipment should be properly grounded. Particular  
attention should be given to supply connections other than direct connections to  
the mains.  
To rack-mount devices:  
1. Attach the brackets to the device using the screws provided in the Bracket  
Mounting Kit.  
Figure 3-1. Attaching the Brackets  
3-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
Mounting  
3
2. Mount the device in the rack, using four rack-mounting screws (not provided).  
Be sure to secure the lower rack-mounting screws first to prevent the brackets  
being bent by the weight of the switch.  
Figure 3-2. Installing the Switch in a Rack  
3. If installing a single switch only, turn to “Connecting to a Power Source” at the  
end of this chapter.  
4. If installing multiple switches, mount them in the rack, one below the other, in  
any order.  
5. If also installing an RPS, mount it in the rack below the other devices.  
Desktop or Shelf Mounting  
1. Attach the four adhesive feet to the bottom of the first switch.  
r t o s  
P
b o  
m
o
C
i t  
a b  
i g  
G
2
o r t s  
P
J - 4 5  
R
0
0 0  
0 0 / 1  
/ 1  
1 0  
2
o r t s  
P
P
H
S F  
- X  
- A  
E
S
P
F
B A  
1 0  
4 2  
S
0
0
0
- 1  
4
2
M
S
Figure 3-3. 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.  
3-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Installing the Switch  
3
3. If installing a single switch only, go to “Connecting to a Power Source” 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.  
5. If also installing an RPS, place it close to the stack.  
Installing an Optional SFP Transceiver  
100BASE-X transceiver  
1000BASE-X transceiver  
Figure 3-4. Inserting an SFP Transceiver into a Slot  
The switch supports 100BASE-FX, 100BASE-BX, 1000BASE-SX, 1000BASE-LX,  
1000BASE-LH and other SFP-compatible transceivers.  
To install an SFP transceiver, do the following:  
1. Consider network and cabling requirements to select an appropriate SFP  
transceiver type.  
2. Insert the transceiver with the optical connector facing outward and the slot  
connector facing down. Note that SFP transceivers are keyed so they can only  
be installed in one orientation.  
3. Slide the SFP transceiver into the slot until it clicks into place.  
Note: SFP transceivers are hot-swappable. The switch does not need to be powered off  
before installing or removing a transceiver. However, always first disconnect the  
network cable before removing a transceiver.  
Note: SFP transceivers are not provided in the switch package.  
3-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Connecting to a Power Source  
3
Connecting to a Power Source  
To connect a device to a power source:  
1. Insert the power cable plug directly into the socket located at the back of the  
device.  
BPS  
100/115/ 220/230  
1.0/1.0/0.5/0.5  
50/60 HZ  
V
A
DC IN  
12V 4 .5A(4 5A)  
,
Figure 3-5. Power Sockets  
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 socket type in your  
country.  
3. Check the front-panel LEDs as the device is powered on to be sure the Power  
LED is lit. If not, check that the power cable is correctly plugged in.  
4. If you have purchased a Redundant Power Unit, connect it to the switch and to  
an AC power source now, following the instructions included with the package.  
Connecting to the Console Port  
The RJ-45 serial port on the switch’s front panel is used to connect to the switch for  
out-of-band console configuration. The on-board 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 table.  
8
8
1
1
Figure 3-6. Serial Port (RJ-45) Pin-Out  
3-5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
Installing the Switch  
3
Wiring Map for Serial Cable  
Table 3-1 Serial Cable Wiring  
Null Modem  
Switch’s 8-Pin  
Serial Port  
PC’s 9-Pin  
DTE Port  
6 RXD (receive data)  
3 TXD (transmit data)  
<---------------------------- 3 TXD (transmit data)  
-----------------------------> 2 RXD (receive data)  
5 SGND (signal ground) ------------------------------ 5 SGND (signal ground)  
No other pins are used.  
The serial port’s configuration requirements are as follows:  
Default Baud rate—9,600 bps  
Character Size—8 Characters  
Parity—None  
Stop bit—One  
Data bits—8  
Flow control—none  
3-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Chapter 4: Making Network Connections  
Connecting Network Devices  
The SM24-100SFP-AH is designed to interconnect multiple segments (or collision  
domains) using optional SFP transceivers. It can be connected to network cards in  
PCs and servers, as well as to hubs, switches or routers. Two combination  
1000BASE-T/SFP ports provide the uplink connection from the switch to other  
switches or routers at the central office.  
Twisted-Pair Devices  
Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors  
at both ends. Use Category 5, 5e or 6 cable for 1000BASE-T connections, Category  
5 or better for 100BASE-TX connections, and Category 3 or better for 10BASE-T  
connections.  
Cabling Guidelines  
The RJ-45 ports on the switch supports automatic MDI/MDI-X pinout configuration,  
so you can use standard straight-through twisted-pair cables to connect to any other  
network device (PCs, servers, switches, routers, or hubs).  
See Appendix B for further information on cabling.  
Caution: Do not plug a phone jack connector into an RJ-45 port. This will damage the  
switch. Use only twisted-pair cables with RJ-45 connectors that conform to  
FCC standards.  
Connecting to PCs, Servers, Hubs and Switches  
1. Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector.  
Figure 4-1. Making Twisted-Pair Connections  
4-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
                 
Making Network Connections  
4
2. If the device is a PC card and the switch is in the wiring closet, attach the other  
end of the cable segment to a modular wall outlet that is connected to the wiring  
closet. (See “Network Wiring Connections” on page 4-2.) Otherwise, attach the  
other end to an available port on the switch.  
Make sure each twisted pair cable does not exceed 100 meters (328 ft) in  
length.  
3. As each connection is made, the Link LED (on the switch) corresponding to  
each port will light to indicate that the connection is valid.  
Note: Avoid using flow control on a port connected to a hub unless it is actually required  
to solve a problem. Otherwise back pressure jamming signals may degrade  
overall performance for the segment attached to the hub.  
Network Wiring 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. Attach one end of a patch cable to an available port on the switch, and the other  
end to the patch panel.  
2. If not already in place, attach one end of a cable segment to the back of the  
patch panel where the punch-down block is located, and the other end to a  
modular wall outlet.  
3. Label the cables to simplify future troubleshooting.  
Equipment Rack  
Switch  
(side view)  
SM24-100SFP-AH  
24 100BASE-X SFP Ports  
2
1
0
/
1
0
0
/
1
0
0
0
R
J
-
4
5
P
o
r
t
s
2
G
i
g
a
b
i
t
C
o
m
b
o
P
o
r
t
s
Punch-Down Block  
Patch Panel  
Wall  
Figure 4-2. Network Wiring Connections  
4-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
Fiber Optic SFP Devices  
4
Fiber Optic SFP Devices  
An optional SFP transceiver (100BASE-FX, 100BASE-BX, 1000BASE-SX,  
1000BASE-LX, or 1000BASE-LH) can be used for a backbone connection between  
switches, or for connecting to a server or PC.  
Each multimode fiber optic port requires 50/125 or 62.5/125 micron multimode fiber  
optic cabling with an LC connector at both ends. Each single-mode fiber port  
requires 9/125 micron single-mode fiber optic cable with an LC connector at both  
ends.  
Warning: 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.  
Warning: When selecting a fiber SFP device, considering safety, please make sure that it  
can function at a temperature that is not less than the recommended maximum  
operational temperature of the product. You must also use an approved Laser  
Class 1 SFP transceiver.  
1. Remove and keep the LC 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 LC port on the switch and the other end to  
the LC port on the other device. Since LC connectors are keyed, the cable can  
be attached in only one orientation.  
Figure 4-3. Making Fiber 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.  
4-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Making Network Connections  
4
The maximum length for fiber optic cable operating at Fast Ethernet speed will  
depend on the fiber type as listed under “100 Mbps Fast Ethernet Collision Domain”  
on page 4-5. The maximum length for fiber optic cable operating at Gigabit speed  
will depend on the fiber type as listed under “1000 Mbps Gigabit Ethernet Collision  
Domain” on page 4-4.  
Connectivity Rules  
When adding hubs (repeaters) to your network, please follow the connectivity rules  
listed in the manuals for these products. However, note that because switches break  
up the path for connected devices into separate collision domains, you should not  
include the switch or connected cabling in your calculations for cascade length  
involving other devices.  
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) or Category 6 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 802.3-2005 standards.  
1000 Mbps Gigabit Ethernet Collision Domain  
Table 4-1. Maximum 1000BASE-T Gigabit Ethernet Cable Length  
Cable Type  
Maximum Cable Length Connector  
100 m (328 ft) RJ-45  
Category 5, 5e, 6 100-ohm UTP or STP  
Table 4-2. Maximum 1000BASE-SX Gigabit Ethernet Cable Length  
Fiber Size  
Fiber Bandwidth  
160 MHz/km  
Maximum Cable Length Connector  
62.5/125 micron  
multimode fiber  
2-220 m (7-722 ft)  
2-275 m (7-902 ft)  
2-500 m (7-1641 ft)  
2-550 m (7-1805 ft)  
LC  
LC  
LC  
LC  
200 MHz/km  
50/125 micron multimode 400 MHz/km  
fiber  
500 MHz/km  
Table 4-3. Maximum 1000BASE-LX Gigabit Ethernet Cable Length  
Fiber Size  
Fiber Bandwidth  
Maximum Cable Length  
Connector  
9/125 micron  
single-mode fiber  
N/A  
2 m - 5 km (7 ft - 3.2 miles) LC  
4-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
           
Connectivity Rules  
4
Table 4-4. Maximum 1000BASE-LH Gigabit Ethernet Cable Length  
Fiber Size  
Fiber Bandwidth  
Maximum Cable Length  
Connector  
9/125 micron  
single-mode fiber  
N/A  
2 m - 70 km (7 ft - 43.5 miles) LC  
100 Mbps Fast Ethernet Collision Domain  
Table 4-5. Maximum Fast Ethernet Cable Length  
Type  
Cable Type  
Max. Cable Length Connector  
100BASE-TX  
100BASE-FX  
Category 5 or better 100-ohm UTP or STP 100 m (328 ft)  
62.5/125 or 50/125 micron multimode fiber 2 km (1.6 miles)  
RJ-45  
LC  
100BASE-FX20 9/125 micron single-mode fiber  
100BASE-FX60 9/125 micron single-mode fiber  
100BASE-BX10 9/125 micron single-mode fiber  
100BASE-BX20 9/125 micron single-mode fiber  
20 km (16 miles)  
60 km (37.5 miles)  
10 km (6.25 miles)  
20 km (16 miles)  
LC  
LC  
LC  
LC  
10 Mbps Ethernet Collision Domain  
Table 4-6. Maximum Ethernet Cable Length  
Cable Type Max. Cable Length Connector  
Type  
10BASE-T  
Twisted Pair, Categories 3, 4, 5 or better 100 m (328 ft)  
100-ohm UTP  
RJ-45  
4-5  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
Making Network Connections  
4
Cable Labeling and Connection Records  
When planning a network installation, it is essential to label the opposing ends of  
cables and to record where each cable is connected. Doing so will enable you to  
easily locate inter-connected devices, isolate faults and change your topology  
without need for unnecessary time consumption.  
To best manage the physical implementations of your network, follow these  
guidelines:  
• Clearly label the opposing ends of each cable.  
• Using your building’s floor plans, draw a map of the location of all  
network-connected equipment. For each piece of equipment, identify the devices  
to which it is connected.  
• Note the length of each cable and the maximum cable length supported by the  
switch ports.  
• For ease of understanding, use a location-based key when assigning prefixes to  
your cable labeling.  
• Use sequential numbers for cables that originate from the same equipment.  
• Differentiate between racks by naming accordingly.  
• Label each separate piece of equipment.  
• Display a copy of your equipment map, including keys to all abbreviations at each  
equipment rack.  
4-6  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Appendix A: Troubleshooting  
Diagnosing Switch Indicators  
Table A-1. Troubleshooting Chart  
Symptom  
Action  
Pwr LED is Off  
Power supply is disconnected.  
Check connections between the switch, the power cord, and the wall  
outlet.  
Contact your dealer for assistance.  
Pwr LED is Amber  
OK LED is Amber  
Internal power supply has failed. Contact your local dealer for assistance.  
Power cycle the switch to try and clear the condition.  
If the condition does not clear, contact your dealer for assistance.  
Port 1-28 LED is Off  
Verify that the switch and attached device are powered on.  
Be sure the cable is plugged into both the switch and corresponding  
device.  
Verify that the proper cable type is used and its length does not exceed  
specified limits.  
Check the adapter on the attached device and cable connections for  
possible defects. Replace the defective adapter or cable if necessary.  
Diagnosing Power Problems with the LEDs  
The Pwr and BPS LEDs work in combination to indicate power status as follows.  
Table A-2. Pwr/BPS LEDs  
Pwr LED  
BPS LED  
Status  
Green  
Yellow  
Internal power functioning normally; BPS plugged in  
but faulty, such as a thermal or fan failure.  
Green  
Off  
Internal power functioning normally; BPS not  
plugged in.  
Yellow  
Off  
Green  
Off  
Internal power faulty; BPS delivering power.  
Both internal power and BPS unplugged or not  
functioning.  
A-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Troubleshooting  
A
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.  
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 tools. 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.  
Caution: The management agent can accept up 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  
Download from Www.Somanuals.com. All Manuals Search And Download.  
             
Appendix B: Cables  
Twisted-Pair Cable and Pin Assignments  
For 10/100BASE-TX connections, a twisted-pair cable must have two pairs of wires.  
For 1000BASE-T connections the twisted-pair cable must have four pairs of wires.  
Each wire pair is identified by two different colors. For example, one wire might be  
green and the other, green with white stripes. Also, an RJ-45 connector must be  
attached to both ends of the cable.  
Caution: Each wire pair must be attached to the RJ-45 connectors in a specific  
orientation.  
Caution: DO NOT plug a phone jack connector into any RJ-45 port. This will damage the  
switch. Use only twisted-pair cables with RJ-45 connectors that conform with  
FCC standards.  
The figure below 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.  
8
8
1
1
Figure B-1. RJ-45 Connector Pin Numbers  
10BASE-T/100BASE-TX Pin Assignments  
Use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for RJ-45  
connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or  
100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that the  
length of any twisted-pair connection does not exceed 100 meters (328 feet).  
The RJ-45 ports on the switch base unit 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. 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. When using any RJ-45 port on this switch, you can use either  
straight-through or crossover cable.  
B-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
           
Cables  
B
Table B-1. 10/100BASE-TX MDI and MDI-X Port Pinouts  
Pin  
MDI Signal Name  
Transmit Data plus (TD+)  
Transmit Data minus (TD-)  
Receive Data plus (RD+)  
Receive Data minus (RD-)  
Not used  
MDI-X Signal Name  
Receive Data plus (RD+)  
Receive Data minus (RD-)  
Transmit Data plus (TD+)  
Transmit Data minus (TD-)  
Not used  
1
2
3
6
4,5,7,8  
Note: The “+” and “-” signs represent the polarity of the wires that make  
up each wire pair.  
Straight-Through Wiring  
If the twisted-pair cable is to join two ports and only one of the ports has an internal  
crossover (MDI-X), the two pairs of wires must be straight-through. (When  
auto-negotiation is enabled for any RJ-45 port on this switch, you can use either  
straight-through or crossover cable to connect to any device type.)  
You must connect all four wire pairs as shown in the following diagram to support  
Gigabit Ethernet connections.  
EIA/TIA 568B RJ-45 Wiring Standard  
10/100BASE-TX Straight-through Cable  
White/Orange Stripe  
Orange  
White/Green Stripe  
Blue  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
End A  
End B  
White/Blue Stripe  
Green  
White/Brown Stripe  
Brown  
Figure B-2. Straight-through Wiring  
Crossover Wiring  
If the twisted-pair cable is to join two ports and either both ports are labeled with an  
“X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover must be  
implemented in the wiring. (When auto-negotiation is enabled for any RJ-45 port on  
this switch, you can use either straight-through or crossover cable to connect to any  
device type.)  
You must connect all four wire pairs as shown in the following diagram to support  
Gigabit Ethernet connections.  
B-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
       
Twisted-Pair Cable and Pin Assignments  
B
10/100BASE-TX Crossover Cable  
White/Orange Stripe  
Orange  
White/Green Stripe  
Blue  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
End A  
End B  
White/Blue Stripe  
Green  
White/Brown Stripe  
Brown  
Figure B-3. Crossover Wiring  
1000BASE-T Pin Assignments  
All 1000BASE-T ports 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, 5e or 6 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)  
.
Table B-2. 1000BASE-T MDI and MDI-X Port Pinouts  
Pin  
1
MDI Signal Name  
MDI-X Signal Name  
Bi-directional Data One Plus (BI_D1+)  
Bi-directional Data One Minus (BI_D1-)  
Bi-directional Data Two Plus (BI_D2+)  
Bi-directional Data Three Plus (BI_D3+)  
Bi-directional Data Three Minus (BI_D3-)  
Bi-directional Data Two Minus (BI_D2-)  
Bi-directional Data Four Plus (BI_D4+)  
Bi-directional Data Four Minus (BI_D4-)  
Bi-directional Data Two Plus (BI_D2+)  
Bi-directional Data Two Minus (BI_D2-)  
Bi-directional Data One Plus (BI_D1+)  
Bi-directional Data Four Plus (BI_D4+)  
Bi-directional Data Four Minus (BI_D4-)  
Bi-directional Data One Minus (BI_D1-)  
Bi-directional Data Three Plus (BI_D3+)  
Bi-directional Data Three Minus (BI_D3-)  
2
3
4
5
6
7
8
B-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Cables  
B
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.  
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 or  
Category 6 cables.  
2. Reduce the number of connectors used in the link.  
3. Reconnect some of the connectors in the link.  
B-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Appendix C: Supported SFP Transceivers  
Please contact Transition Networks for proper SFP selection.  
Note: Power budget constraints must be considered when calculating the maximum  
cable length for your specific environment.  
C-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
   
Supported SFP Transceivers  
C
C-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Appendix D: Specifications  
Physical Characteristics  
Ports  
24 100BASE-X ports, with auto-negotiation  
2 1000BASE-T ports (RJ-45)  
2 Combination Gigabit ports (RJ-45/SFP)  
Network Interface  
Ports 1-24: SFP (100BASE-FX, 100BASE-BX)  
Ports 25-28: RJ-45 connector, auto MDI/X  
10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)  
100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)  
1000BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)  
Buffer Architecture  
4 Mbits  
Aggregate Bandwidth  
12.8 Gbps  
Switching Database  
8K MAC address entries  
LEDs  
System:  
Pwr (Power Supply), BPS (Backup power supply), OK (Diagnostic)  
Port:  
1-28 (Link/Activity)  
Weight  
3.4 kg (7.5 lbs)  
Size  
4.5 x 44 x 23 cm (1.77 x 17.3 x 9.1 in.)  
D-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
     
Specifications  
D
Temperature  
Operating: 0 to 45 °C (32 to 113 °F)  
Storage: -40 to 70 °C (-40 to 158 °F)  
Humidity  
Operating: 10% to 90% (non-condensing)  
Power Supply  
Internal, auto-ranging transformer: 100 to 240 V, 50-60 Hz, 1.5 A  
Power Consumption  
30 Watts maximum  
Maximum Current  
0.25 A @ 115 VAC  
0.12 A @ 230 VAC  
Switch Features  
Forwarding Mode  
Store-and-forward  
Throughput  
Wire speed  
Flow Control  
Full Duplex: IEEE 802.3x  
Half Duplex: Back pressure  
Management Features  
In-Band Management  
Telnet, HTTP or SNMP manager  
Out-of-Band Management  
RJ-45 console port  
Software Loading  
TFTP in-band, or XModem out-of-band  
D-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
         
Standards  
D
Standards  
IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet  
IEEE 802.1D (Bridging)  
ISO/IEC 8802-3  
Compliances  
CE Mark  
Emissions  
FCC Class A  
EN55022 (CISPR 22) Class A  
EN 61000-3-2/3  
Immunity  
EN 61000-4-2/3/4/5/6/8/11  
Safety  
UL/CUL (UL 60950-1, CSA 22.2 NO60950-1)  
CB (IEC60950-1)  
D-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
           
Specifications  
D
D-4  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Glossary  
10BASE-T  
IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5  
UTP cable.  
100BASE-BX  
IEEE 802.3-2005 specification for 100 Mbps Fast Ethernet over one strand of 9/125  
micron core fiber cable.  
100BASE-FX  
IEEE 802.3-2005 specification for 100 Mbps Fast Ethernet over two strands of  
9/125, 50/125 or 62.5/125 micron core fiber cable.  
100BASE-TX  
IEEE 802.3u specification for 100 Mbps Ethernet over two pairs of Category 5 UTP  
cable.  
1000BASE-LH  
Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron core  
fiber cable.  
1000BASE-LX  
Specification for long-haul Gigabit Ethernet over two strands of 50/125, 62.5/125 or  
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, 5e or 6  
twisted-pair cable (using all four wire pairs).  
Auto-Negotiation  
Signalling method allowing each node to select its optimum operational mode (e.g.,  
speed and duplex mode) 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.  
Glossary-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Glossary  
Collision  
A condition in which packets transmitted over the cable interfere with each other.  
Their interference makes both signals unintelligible.  
Collision Domain  
Single CSMA/CD LAN segment.  
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.  
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.  
IEEE 802.3ab  
Defines CSMA/CD access method and physical layer specifications for  
1000BASE-T Gigabit Ethernet. (Now incorporated into IEEE 802.3-2005.)  
Glossary-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Glossary  
IEEE 802.3u  
Defines CSMA/CD access method and physical layer specifications for  
100BASE-TX Fast Ethernet. (Now incorporated into IEEE 802.3-2005.)  
IEEE 802.3x  
Defines Ethernet frame start/stop requests and timers used for flow control on  
full-duplex links. (Now incorporated into IEEE 802.3-2005.)  
IEEE 802.3z  
Defines CSMA/CD access method and physical layer specifications for 1000BASE  
Gigabit Ethernet.(Now incorporated into IEEE 802.3-2005.)  
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.  
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.  
Modal Bandwidth  
Bandwidth for multimode fiber is referred to as modal bandwidth because it varies  
with the modal field (or core diameter) of the fiber. Modal bandwidth is specified in  
units of MHz per km, which indicates the amount of bandwidth supported by the fiber  
for a one km distance.  
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.  
RJ-45 Connector  
A connector for twisted-pair wiring.  
Switched Ports  
Ports that are on separate collision domains or LAN segments.  
Glossary-3  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Glossary  
TIA  
Telecommunications Industry Association  
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.  
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  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Index  
Numerics  
E
10 Mbps connectivity rules 4-5  
100 Mbps connectivity rules 4-5  
1000BASE-T  
equipment checklist 3-1  
Ethernet connectivity rules 4-5  
pin assignments B-3  
ports 1-2  
100BASE-TX  
F
Fast Ethernet connectivity rules 4-5  
features D-2  
management 1-6  
full duplex connectivity 2-1  
pin assignments B-1  
ports 1-2  
10BASE-T  
pin assignments B-1  
ports 1-2  
A
G
adhesive feet, attaching 3-3  
air flow requirements 3-1  
application example 2-2  
grounding for racks 3-2  
I
B
brackets, attaching 3-2  
buffer size D-1  
connecting devices to the switch 4-1  
power requirements 3-1  
C
cable  
labeling and connection records 4-6  
cleaning fiber terminators 4-3  
compliances  
wiring closet connections 4-2  
Introduction 2-1  
EMC D-3  
safety D-3  
connectivity rules  
10 Mbps 4-5  
100 Mbps 4-5  
console port, pin assignments 3-5  
contents of package 3-1  
cooling problems A-2  
cord sets, international 3-5  
L
laser safety 4-3  
LED indicators  
Link 1-3  
Power 1-4  
location requirements 3-1  
M
D
management  
desktop mounting 3-3  
device connections 4-1  
agent 1-2  
features 1-6, D-2, D-3  
out-of-band 1-2  
SNMP 1-2  
Index-1  
Download from Www.Somanuals.com. All Manuals Search And Download.  
 
Index  
Web-based 1-2  
pinouts B-3  
mounting the switch  
rubber foot pads, attaching 3-3  
in a rack 3-2  
on a desktop or shelf 3-3  
multimode fiber optic cables 4-3  
S
screws for rack mounting 3-2  
N
network  
connections 4-1  
examples 2-2  
physical D-1  
power D-2  
O
standards, compliance D-3  
status LEDs 1-3  
surge suppressor, using 3-1  
out-of-band management 1-2  
P
package contents 3-1  
pin assignments B-1  
console port 3-5  
ports, connecting to 4-1  
power, connecting to 3-5  
T
Telnet A-2  
temperature within a rack 3-2  
troubleshooting  
in-band access A-2  
power and cooling problems A-2  
twisted-pair connections 4-1  
R
rack mounting 3-2  
rear panel receptacles 1-5  
RJ-45 port 1-2  
connections 4-1  
W
Web-based management 1-2  
Index-2  
Download from Www.Somanuals.com. All Manuals Search And Download.  
Download from Www.Somanuals.com. All Manuals Search And Download.  
SM24-100SFP-AH  
E082008-DT-R01  
150200069500A  
Download from Www.Somanuals.com. All Manuals Search And Download.  

Technicolor Thomson DVD Player DTH8000 User Manual
Technika Stereo System MC 429ID User Manual
TOA Electronics Portable Speaker HS 1200BT User Manual
Toastmaster Double Oven CO36 User Manual
Trango Broadband Stereo System AD900 9 User Manual
Uniden Telephone WDSS 5315 User Manual
Vizio Model Vehicle M470VSE User Manual
VTech Baby Toy 91 002594 000 User Manual
VTech Baby Toy 91 002690 005 User Manual
Wagner SprayTech Paint Sprayer D GB F NL User Manual