Versitron S72450 User manual

B030730359450
S72450
24-port 10/100 Switch
Installation Guide
Copyright July 2003
VERSITRON, Inc.
83 Albe Drive / Suite C
Newark, DE 19702
www.versitron.com

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The information contained in this document is subject to change without prior notice.
Copyright VERSITRON. All Rights Reserved.
TRADEMARKS
All brand names are trademarks or registered trademarks of their respective holders.
WARNING:
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 in which case the user
will be required to correct the interference at his own expense.
NOTICE:
(1)The changes or modifications not expressively approved by the party responsible for
Compliance could void the user authority to operate the equipment.
(2)Shielded interface cables and AC power cord, if any, must be used in order to comply with
the emission limits.
CISPR A COMPLIANCE:
This device complies with EMC directive of the European Community and meets or exceeds the
following technical standard.
EN 55022 - Limits and Methods of Measurement of Radio Interference Characteristics of
Information Technology Equipment. This device complies with CISPR Class A.
WARNING: This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
CE NOTICE
Marking by the symbol indicates compliance of this equipment to the EMC directive of the
European Community. Such marking is indicative that this equipment meets or exceeds the
following technical standards:
EN 55022: Limits and Methods of Measurement of Radio Interference characteristics of
Information Technology Equipment.
EN 50082/1:Generic Immunity Standard -Part 1: Domestic Commercial and Light Industry.
EN 60555-2: Disturbances in supply systems caused by household appliances and similar
electrical equipment - Part 2: Harmonics.

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PROPRIETARY DATA
All data in this manual is proprietary and may not be disclosed,
used or duplicated, for procurement or manufacturing purposes,
without prior written permission by VERSITRON, Inc.
WARRANTY
All VERSITRON products are warranted for a period of one year from date of delivery.
VERSITRON reserves the right to repair or, at our option, replace parts which during normal usage
prove to be defective during the warranty period provided that:
1. You call VERSITRON at 302-894-0699 or 800-537-2296 and obtain a Return Maintenance
Authorization (RMA) Number. Please reference your RMA number on the outside of the box in
which the item is shipped.
2. Shipping charges are pre-paid.
No other warranty is expressed or implied and we are not liable for consequential damages. For
repairs outside of the warranty period, the same procedure must be followed.

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Table of Contents
1. Introduction.......................................................................................1
1.1 Package Contents ................................................................................1
2. Installation.........................................................................................2
2.1 Where to Place the 24-port Switch......................................................2
3. Configure the Network Connection.................................................3
3.1 Connecting Devices to the 24-port Switch..........................................3
3.2 Connecting to Another Ethernet Switch/Hub......................................3
3.3 Application Example...........................................................................4
4. For 100BaseFX Connection..............................................................5
4.1 Adding 100BaseFX Module................................................................5
5. LEDs Conditions Definitions............................................................6
5.1 LEDs Defined......................................................................................6
6. Configure from Console...................................................................7
6.1 Hardware Setting for Console.............................................................7
6.2 Operation in Console...........................................................................7

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1. Introduction
The Model S72450 24-port Switch is a 24-port 10/100Mbps Fast Ethernet switch. This switch
supports the advanced features for current switch design. This switch can auto detect
10/100Mbps speed, full/half duplex mode, MDI/MDI-X connection and provides an option for
one 100BaseFX expansion module port. This feature provides the user a simple way to complete
the network connection with the switch.
The Model S72450 24-port Switch provides console management functions. You can configure
the switch from the console for VLAN setting, port setting and priority setting. The switch
supports CoS function for advanced network applications. The switch also supports 2 priority
transmit queues per port and long Ethernet packets of up to 1522 bytes for tagged packets.
1.1 Package Contents
•One 24-port Switch
•One AC power cord
•One console cable
•Two rack-mount kits and screws
•This user’s guide

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2. Installation
2.1 Where to Place the 24-port Switch
This 24-port Switch can be placed on a flat surface (your desk, shelf or table).
Place the 24-port Switch at a location with these connection considerations in mind:
•The switch configuration does not break the rules as specified in Section 3.
•The switch is accessible and cables can be connected easily to it.
•The cables connected to the switch are away from sources of electrical interference such as
radio, computer monitor, and light fixtures.
•There is sufficient space surrounding the switch to allow for proper ventilation (the switch
may not function according to specifications beyond the temperature range of 0 to 50
degrees C).
You can also install this 24-port Switch in a 19" rack with the rack-mount kits as shown below:

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3. Configure the Network Connection
3.1 Connecting Devices to the 24-port Switch
•Use Category 3 or 5 twisted-pair Ethernet cable when connecting 10BaseT devices to the
switch (cable pin assignments defined in Appendix A)
•Use Category 5 (straight-through) twisted-pair Ethernet cable when connecting 100BaseTX
devices to the switch (cable specifications defined in Appendix B)
•Always limit the cable distance to 100 meters (328 ft) as defined by IEEE specification
•If your switch has a FX port, you can connect long distance fiber optic cable to the switch.
•Because this switch supports Auto MDI/MDI-X detection, you can use normal straight
through cable for both workstation connection and hub/switch cascading.
3.2 Connecting to Another Ethernet Switch/Hub
This 24-port Switch can be connected to existing 10 Mbps or 100 Mbps hubs/switches. Because
all of the TP ports on the 24-port Switch are Auto MDI/MDI-X, you can connect from any TP
port of the 24-port Switch to the MDI or MDI-X port of another hub/switch with Straight
Through or crossover cables.
100BaseTX
Cat5 Twisted-pair cable
Max100m/328ft 10BaseT
Cat3,4,5 Twisted-pair cable
Max 100m/328ft PC
FS
TO: MDI or MDI-X port
Max 100m/328ft

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3.3 Application Example
A switch can be used to overcome the hub-to-hub connectivity limitations as well as improve
overall network performance. Switches make intelligent decisions about where to send network
traffic based on the destination address of the packet. As a result, the switch can significantly
reduce unnecessary traffic.
The example below demonstrates the switch ability to segment the network. The number of
nodes on each segment is reduced thereby minimizing network contention (collisions) and
boosting the available bandwidth per port.
Workgroup
Power User
Workgroup
FS
FS Hub/Switch
Hub/Switch
Another Ethernet
Switch

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4. For 100BaseFX Module
4.1 Adding 100BaseFX Module
This 24-port switch has a module port for a 100BaseFX connection extension. You can add one
100BaseFX module to the switch for long distance fiber optic cable connection. But when this
module is added, the 24th TP port will be disabled and this FX port becomes the 24th port.
Please follow the steps to add the module to the switch:
1. Turn off the switch
2. Loosen the screws of the blank cover and remove the cover from the module port of the
switch.
3. Slide in the module into the module port.
4. Tighten the screws of the module to the switch.
5. Connect the fiber optic cable to the FX port of the module.
6. Power on the switch.
7. Refer to Section 6 to configure Port 24 to (Auto-Disable, 100Mbps, Full duplex) for
100BaseFX connection from the console.
Module Port

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5. LEDs Conditions Definition
5.1 Adding 100BaseFX Module
The LEDs provide useful information about the switch and the status of all individual ports.
LED STATUS CONDITION
Power ON Switch is receiving power.
ON Port has established a valid link.
Flashing Data packets being received or sent.
Green Connection speed is 100Mbps.
Link / Act
Yellow Connection speed is 10Mbps.
ON Connection is Full Duplex.
FDX / Col Flashing Packet collisions occurring. A low level of
collision is a part of normal Ethernet Operation.

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6. Configure from Console
6.1 Console Hardware Setting
Before using the console connection to configure the switch, please make sure that you have
already installed the terminal program “HyperTrm” in your MS Windows operating software. If
you cannot find it in your Windows please install it first with your Windows Installation Disk.
You can also use other terminal programs for console setting if you already have one.
1. Please connect from the console port of the Switch to COM port of the PC (COM1 or
COM2) with the attached console cable.
2. Start the terminal program. Select the COM port on the PC and set the operation
configuration to [9600,8,N,1]and the terminal interface to Auto.
3. Power on the switch and the following screen will appear on your terminal screen. If you
cannot find it, please restart the terminal program and reboot the switch.
There are five items in the setup menu. You can select one and following the directions to
complete the setting.
6.2 Console Operation
1. System Setting:
There is only one item in this function. You can enable or disable the backpressure function for
half-duplex. If it is enabled, it can prevent packets lost in half-duplex mode. But it will also
reject packets when the network traffic is very heavy and that may cause some network
connections to fail.

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2. Port Setting:
You can set the operation speed and duplex mode from here. If “Auto-Negotiation” is enabled
then the settings in speed and duplex will be ignored. If “Auto-Negotiation” is disabled then the
speed and duplex setting will take effect.
3. VLAN Setting:
You can configure VLAN groups from this function. Because every port must belong to some
VLAN, the removed port from VLAN will be assigned to Group 24 automatically if it does not
belong to any VLAN any more after being removed. In the setting, VLAN groups can be
overlapped on ports in this switch.

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4. Priority Setting:
There are two transmit priority queues for each port of the switch and you can configure the
priority setting here.
Port Based: If the setting of a port is set to H then all the packets received from this port will
always be forwarded to the high priority queue and will be sent with high priority.
VLAN Based: If the setting of a port is set to E then tagged packets received from this sport will
be forwarded with a the priority information in the tag.
5. Restore Default Setting:
You can restore to the default setting of the switch with this function.

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A. Product Specifications
AccessMethod CSMA/CD, 10 Mbps or 100 Mbps
Standards Conformance IEEE 802.3 10BASE-T,
IEEE 802.3u 100BASETX/FX
Communication Rate 10/100Mbps on RJ-45 ports, 100Mbps on FX port
Communication Mode Full / Half duplex
Media Supported 10BASE-T - 100 Ohm Category 3,4,5 twisted-pair
100BASE-TX - 100 Ohm Category 5 twisted-pair
100BASE-FX - fiber optic cable
Indicator Panel LEDs for Power (each unit),
Link/Act, FDX/Col. (each port)
Number of Ports 24* RJ45 TX ports, 1* module port
Console RS232 interface [9600,8,N,1]
MDI-X/MDI Selection Auto detect
Dimensions 17.32 x 6.77 x 1.69 in. (440 x 172 x 43 mm.)
Certification CE Mark
Emissions FCC Class A
Immunity IEC 1000-4-2/3/4
Power Consumption 16Watts max.
Input Power Full range: 100 to 240V, 50 to 60 Hz
Temperature Standard Operating: 0 to 500C
Storage: -40 to 700C
Humidity 5% to 95% (Non-condensing)
Network Bridging Function Filtering, forwarding and learning
Switching Method Store-and-forward
Address Table 8K entries
Filtering/Forwarding Rate Line speed
VLAN 24 groups max., configured from console
CoS 2 transmit queues per port
Priority Port-Based or Tagged-Based

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B. Cable Specification
Two different types of cable could be used on this 24-port Switch:
lStraight through cable
lCross-over cable
lFiber Optic cable if this 24-port Switch has FX port
Cable Schematics
Straight-Through Cable
Hub / Switch side Adapter side
Pin # Pair # Pin # Pair #
1 RX+ White-Green ---------------- 1 RX+ White-Green
2 RX- Green ---------------- 2 RX- Green
3 TX+ White-Orange ---------------- 3 TX+ White-Orange
4 Not Used Blue ---------------- 4 Not Used Blue
5 Not Used White-Blue ---------------- 5 Not Used White-Blue
6 TX- Orange ---------------- 6 TX- Orange
7 Not Used White-Brown ---------------- 7 Not Used White-Brown
8 Not Used Brown ---------------- 8 Not Used Brown
Cross-Over Cable
Hub / Switch side Hub / Switch side
Pin # Pair # Pin # Pair #
1 RX+ White-Green ---- ---- 1 RX+ White-Green
2 RX- Green ---- ---- 2 RX- Green
3 TX+ White-Orange ---- ---- 3 TX+ White-Orange
4 Not Used Blue 4 Not Used Blue
5 Not Used White-Blue 5 Not Used White-Blue
6 TX- Orange ---- ---- 6 TX- Orange
7 Not Used White-Brown 7 Not Used White-Brown
8 Not Used Brown 8 Not Used Brown

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C. Compliance
EMI Certification
FCC Class A Certification (USA)
Warning: 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 digital
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 are required to correct the interference.
Canada Department of Communications - 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.
CE Mark Declaration of Conformance for EMI and Safety (EEC)
This is to certify that this product complies with ISO/IEC Guide 22 and EN45014.
It conforms to the following specifications:
EMC: EN55022 (1988)/CISPR-22 (1985) class A
EN60555-2 (1995) class A
EN60555-3
IEC1000-4-2 (1995) 4kV CD, 8kV AD
IEC1000-4-3 (1995) 3V/m
IEC1000-4-4 (1995) 1kV - (power line), 0.5kV - (signal line)
This product complies with the requirements of the Low Voltage Directive 73/23/EEC and the
EMC Directive 89/336/EEC.
Warning! Do not plug a phone jack connector in the RJ-45 port. This may damage this device.