LevelOne GSW-1657 User manual

User's Guide
16/24-port Gigabit Ethernet Switch
GSW-1657
GSW-2457
Ver.1.0.0-0803

COPYRIGHT & TRADEMARKS
Specifications are subject to change without notice. Level One is a
registered trademark of Digital Data Communications Co., Ltd. Other
brands and product names are trademarks or registered trademarks of their
respective holders.
No part of the specifications may be reproduced in any form or by any means
or used to make any derivative such as translation, transformation, or
adaptation without permission from Digital Data Communications Co., Ltd.
All rights reserved.
FCC STATEMENT
The 16/24-port Gigabit Ethernet Switch 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 in a residential installation.
This equipment generates, uses and can radiate radio frequency energy
and, if not installed and used in accordance with the instructions, may
cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the
following measures:
Reorient or relocate the receiving antenna.
¾
Increase the separation between the equipment and receiver.
¾
Connect the equipment into an outlet on a circuit different from that to
¾
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
¾

EC DECLARATION OF CONFORMITY (EUROPE)
In compliance with the EMC Directive 89/336/EEC, Low Voltage Directive
73/23/EEC, this product meets the requirements of the following standards:
EN55022
¾
EN55024
¾
EN60950
¾
SAFETY NOTICES
Caution:
Do not use this product near water, for example, in a wet basement or
near a swimming pool.
Avoid using this product during an electrical storm. There may be a remote
risk of electric shock from lightning.

TABLE OF CONTENTS
Package Contents........................................................ 1
Chapter 1: Introduction of the Product.................................. 1
1.1 Overview of the Product............................................ 1
1.2 Features........................................................... 2
Chapter 2: Installation................................................. 2
2.1 Mounting the Switch on a Desk...................................... 2
2.2 Mounting the Switch in a Rack...................................... 3
2.3 Power On........................................................... 4
Chapter 3: Identifying External Components.............................. 4
3.1 Front Panel........................................................ 4
3.2 Rear Panel......................................................... 4
3.3 LED Indicators..................................................... 5
Appendix A: Specifications.............................................. 6
Appendix B: Troubleshooting............................................. 7

1
GSW-1657/2457 Gigabit Ehternet Switch User's Guide
Package Contents
The following contents should be found in your box:
One GSW-1657 or GSW-2457 Switch
¾
One power cord
¾
This User's Guide
¾
Rubber footpads for Desk-mount
¾
Rack-mount kit for installing the switch in a 19-inch rack
¾
Note:
If any of the above contents is damaged or missing, please contact the
retailer from whom you purchased the GSW-1657/GSW-2457 16/24-port Gigabit
Ethernet Switch for assistance.
Chapter 1: Introduction of the Product
This chapter describes the features of the GSW-1657/GSW-2457 16/24-port
Gigabit Ethernet Switch.
1.1 Overview of the Product
The GSW-1657/GSW-2457 16/24-port Gigabit Ethernet Switch provides you
with a high-performance, low-cost, easy-to-use, seamless and standard
upgrade to boost your old network to 1000Mbps. Increase the speed of your
network server and backbone connections make Gigabit a reality. Power
users in the home, office, workgroup, or creative production environment
can now move large, bandwidth-intensive files faster. Transfer graphics,
CGI, CAD, or multimedia files and other applications that have to move
large files across the network almost instantly.
GSW-1657/GSW-2457 features a non-blocking switching architecture that
forwards and filters packets at full wire-speed for maximum throughput.
MAC address auto-learning and auto-aging, IEEE802.3x flow control for

2
GSW-1657/2457 Gigabit Ehternet Switch
full-duplex mode and backpressure for half-duplex mode. It is compatible
with all 10,100, and 1000Mbps Ethernet devices because it is standard-
based, it protects your existing network investments while providing you
with a straightforward migration path to faster Gigabit speeds.
The GSW-1657/GSW-2457 is plug-and-play and no configuration is required.
Auto MDI/MDI-X cable detection on all ports eliminate the need for crossover
cable or Uplink port. Each port can be used as general ports or Uplink
ports, and any port can be simply plugged into a server, a hub, a router or
a switch, using the straight cable or crossover cable. Diagnostic LEDs which
display link status and activity, allowing you to quickly detect and correct
problems on the network.
1.2 Features
Complies with IEEE802.3, IEEE802.3u, IEEE802.3ab standards
¾
16/24 10/100/1000Mbps Auto-Sense RJ45 ports supporting Auto-MDI/MDIX
¾
All ports Support Full/Half Duplex transfer mode for 10/100Mbps and
¾
Full Duplex transfer mode for 1000Mbps
Supports IEEE802.3x flow control for full-duplex mode and backpressure
¾
for half-duplex transfer mode
Non-blocking switching architecture that forwards and filters packets
¾
at full wire-speed for maximum throughput
Supports MAC address auto-learning and auto-aging
¾
LED indicators for monitoring power, fan, link, speed and activity
¾
Rack-mountable steel case
¾
Internal power supply
¾
Chapter 2: Installation
2.1 Mounting the Switch on a Desk
Before place the Switch on a desk, attach four rubber footpads to the
flutes on the Switch bottom, then lay the Switch on the desktop, where can
be have as much as 5kg placed on top.

3
GSW-1657/2457 Gigabit Ehternet Switch User's Guide
Note:
Make sure there is a grounded AC outlet within 1.5 meters, and working
well.
Make sure there is free space for radiating heat and air.
Make sure not to place anything to heavy on top of the switch.
2.2 Mounting the Switch in a Rack
The dimension of GSW-1657/GSW-2457 is designed according to the standard
19 rack-mountable steel case of Electronic Industries Association.
Turn off all the equipment connected to the Switch before mounting it in
the rack, then rivet the two "L" brackets onto each side of the Switch,
fasten it with screws in the rack.
Figure 2-1 Rivet the "L" brackets onto the Switch
Figure 2-2 Fasten the Switch in the rack
POWER
2468
13579111315
1012141620
17192123
182224
FAN
GSW-2457
24-Port Gigabit Ethernet Switch
10121416
9111315
18202224
17192123
Link
Link
Act
Act
1000Mbps
1000Mbps
2468
1357
POWER
2468
13579111315
1012141620
17192123
182224
FAN
GSW-2457
24-Port
Gigabit
Ethernet
Switch
10121416
9111315
18202224
17192123
Link
Link
Act
Act
1000Mbps
1000Mbps
2468
1357

4
GSW-1657/2457 Gigabit Ehternet Switch
2.3 Power On
GSW-1657/GSW-2457 16/24-port Gigabit Ethernet Switch is powered by AC
power supply. Powering on the Switch, it will automatically initialize and
its LED indicators should respond as follows:
All of the Link/Act and 1000Mbps LED indicators will flash momentarily
1)
for one second, which represent a resetting of the system.
The Power indicator will light up.
2)
The FAN LED indicators will light up.
3)
If the LED indicators don't respond as described above, please check the
power supply and connection.
Chapter 3: Identifying External Components
This Chapter describes the front panel, rear panel and LED indicators
of the Switch. GSW-1657 and GSW-2457 just differ in the number of LED
indicators and ports and all figures in this guide are of GSW-2457.
3.1 Front Panel
The front panel of the GSW-2457 consists of switch LED indicators, 24
10/100/1000Mbps RJ-45 ports.
Figure 3-1 GSW-2457 Switch Front Panel sketch
3.2 Rear Panel
The rear panel of the GSW-2457 only features a power receptacle, which is
an AC power receptacle. Connect the female of the power cord head here,
and the male head to the AC power outlet.
POWER
246 8
1 3 5 7 9 11 13 15
10 12 14 16 20
17 19 21 23
18 22 24
FAN
GSW-2457 24-Port Gigabit Ethernet Switch
10 12 14 16
911 13 15
18 20 22 24
17 19 21 23
Link
Link
Act
Act
1000Mbps
1000Mbps
2 4 68
1 3 57

5
GSW-1657/2457 Gigabit Ehternet Switch User's Guide
Figure 3-2 GSW-2457 Switch Rear Panel sketch
3.3 LED Indicators
The LED indicators include Power, FAN, Link/Act and 1000Mbps LED
indicators, which are used for monitoring and pre-troubleshooting of the
Switch. The following section shows the LED indicators for the switch
along with an explanation of each indicator.
Figure 3-3 GSW-2457 Switch LEDs sketch
Power LED: This indicator will light solid red when the Switch
¾
powers up. If the LED is not lit, please check the power supply and
connection.
FAN LED: This indicator will light solid green when the corresponding
¾
cooling fan works properly.
Link/Act LED: This indicator will light solid green when the
¾
corresponding port is connected to another device and will flash
green when data is being transmitted or received on the working
connection.
1000Mbps LED: This indicator will light solid green when the
¾
corresponding port is connected to a 1000Mbps device.
1 00 - 24 0 V ~ 50 -6 0 H z 0 .6 A
POWER
246 8
1 3 5 7 9 11 13 15
10 12 14 16 20
17 19 21 23
18 22 24
FAN
10 12 14 16
911 13 15
18 20 22 24
17 19 21 23
Link
Link
Act
Act
1000Mbps
1000Mbps
2 4 68
1 3 57

6
GSW-1657/2457 Gigabit Ehternet Switch
Appendix A: Specications
General
Standards IEEE802.3 10Base-T
IEEE802.3u 100Base-TX
IEEE802.3ab 1000Base-T
Topology Star
Protocol CSMA/CD
Data Transfer Rate
Ethernet: 10Mbps (Half Duplex), 20Mbps (Full Duplex)
Fast Ethernet: 100Mbps (Half Duplex), 200Mbps (Full Duplex)
Gigabit Ethernet: 2000Mbps (Full Duplex)
Network Media
(Cable)
10Base-T: UTP category 3, 4, 5 cable (maximum 100m)
EIA/TIA-568 100 STP (maximum 100m)
100Base-TX: UTP category 5, 5e cable (maximum 100m)
EIA/TIA-568 100 STP (maximum 100m)
1000Base-T: UTP category 5, 5e cable (maximum 100m)
EIA/TIA-568 100 STP (maximum 100m)
Number of Ports 16/24 10/100/1000Mbps Auto-Negotiation RJ-45 ports
LED indicators Power, FAN, Link/Act, 1000Mbps
Transfer Method Store-and-Forward
MAC Address Learning Automatically learning, automatically aging
Frame Filter Rate 10Base-T: 14880pps/Port
100Base-Tx: 148800pps/Port
1000Base-T: 1488000pps/Port
Frame Forward Rate
10Base-T: 14880pps/Port
100Base-Tx: 148800pps/Port
1000Base-T: 1488000pps/Port
Environmental and Physical
Dimensions 17.3×7.1×1.7in. (440×180×44mm) W×D×H
Power Supply Output 100-240V~ 50/60Hz 0.6A
Operating Temperature 0℃~40℃ (32oF~104oF)
Storage Temperature -40℃~70℃ (-40oF~158oF)

7
GSW-1657/2457 Gigabit Ehternet Switch User's Guide
Operating Humidity 10%~90% non-condensing
Storage Humidity 5%~95% non-condensing
Appendix B: Troubleshooting
1. The Power LED is not lit
Make sure the AC power cord connected the Switch with power source
¾
properly.
Make sure the power source is ON.
¾
2. The Link/Act LED is not lit when a device is connected to the corresponding
port
Make sure that the cable connectors are firmly plugged into the Switch and
¾
the device.
Make sure the connected device is turned on and working well.
¾
The cable must be less than 100 meters long(328 feet).
¾