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24-Port 10/100Mbps Ethernet Switch User Guide
24-Port
10/100Mbps
Ethernet Switch
User Guide
UG-ASW224-1103
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24-Port 10/100Mbps Ethernet Switch User Guide
FCC Warning
This equipment has been tested and found to comply with
the regulations 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 this user's guide, 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.
CE Mark 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.
UL Warning
• Elevated Operating Ambient TemperatureIf installed
in a closed or multi-unit rack assembly, the operating
ambient temperature of the rack environment may be
greater than room ambient. Therefore, consideration
should be given to installing the equipment in an
environment compatible with the manufacturer's
maximum rated ambient temperature (t
• Reduced Air FlowInstallation of the equipment in a
rack should be such that the amount of air flow
MRA
).
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24-Port 10/100Mbps Ethernet Switch User Guide
required for safe operation of the equipment is not
compromised.
• Mechanical LoadingMounting of the equipment in
the rack should be such that a hazardous condition is
not achieved due to uneven mechanical loading.
• Circuit OverloadingConsideration should be given to
the connection of the equipment to the supply circuit
and the effect that overloading of circuits might have
on over current protection and supply wiring.
Appropriate consideration of equipment nameplate
ratings should be used when addressing this concern.
• Reliable EarthingReliable earthing of rack-mounted
equipment should be maintained. Particular attention
should be given to supply connections other than direct
connections to the branch circuit (e.g., use of power
strips).
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24-Port 10/100Mbps Ethernet Switch User Guide
Table of Contents
About this Guide ............................................. 6
Purpose ...................................................................... 6
Terms & Usage ........................................................... 6
Overview of This User Guide .................................. 6
Introduction ...................................................... 7
Fast Ethernet Technology ......................................... 7
Switching Technology .............................................. 8
Features ...................................................................... 9
Unpacking & Installation .............................. 10
Unpacking ................................................................ 11
Installation ................................................................ 11
Rack Mounting ........................................................ 12
External Components .................................... 13
Front Panel ............................................................... 13
LED Indicator Panel ............................................... 15
Twisted Pair Ports ................................................... 15
Rear Panel ................................................................ 16
Technical Specifications ................................ 17
Technical Support .......................................... 19
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24-Port 10/100Mbps Ethernet Switch User Guide
About This Guide
Congratulations on your purchase of the 24-port 10/
100Mbps Ethernet Switch. This device integrates 100Mbps
Fast Ethernet and 10Mbps Ethernet network capabilities in a
highly flexible package.
Purpose
This guide discusses how to install your 24-port
10/100Mbps Ethernet Switch.
Terms & Usage
In this guide, the term “Switch” (first letter upper case)
refers to your 24-port 10/100Mbps Ethernet Switch, and
“switch” (first letter lower case) refers to other Ethernet
switches.
Overview of this User's Guide
This User Guide contains the following sections
IntroductionIntroduction
IntroductionDescribes the Switch and its features.
IntroductionIntroduction
Unpacking and InstallationUnpacking and Installation
Unpacking and InstallationHelps you get started
Unpacking and InstallationUnpacking and Installation
with the basic installation of the Switch.
Identifying External ComponentsIdentifying External Components
Identifying External ComponentsDescribes the
Identifying External ComponentsIdentifying External Components
Switch’s front panel, rear panel, and LED indicators.
TT
echnical Specificationsechnical Specifications
T
echnical SpecificationsLists the Switch’s technical
TT
echnical Specificationsechnical Specifications
(general, physical and environmental, and
performance) specifications.
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Introduction
This chapter describes the features of the Switch and some
background information about Ethernet/Fast Ethernet
switching technology.
Fast Ethernet Technology
The growing importance of local area networks (LANs) and
the increasing complexity of desktop computing
applications are fueling the need for high performance
networks. A number of high-speed LAN technologies have
been proposed to provide greater bandwidth and improve
client/server response times. Among them, 100BASE-T
(Fast Ethernet) provides a non-disruptive, smooth evolution
from the current 10BASE-T technology. The non-disruptive
and smooth evolution nature, and the dominating potential
market base, virtually guarantee cost effective and high
performance Fast Ethernet solutions in the years to come.
100Mbps Fast Ethernet is a new standard specified by the
IEEE 802.3 LAN committee. It is an extension of the 10Mbps
Ethernet standard with the ability to transmit and receive
data at 100Mbps, while maintaining the CSMA/CD Ethernet
protocol. Since the 100Mbps Fast Ethernet is compatible
with all other 10Mbps Ethernet environments, it provides a
straightforward upgrade and takes advantage of the
existing investment in hardware, software, and personnel
training.
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Switching Technology
Another approach to pushing beyond the limits of Ethernet
technology is the development of switching technology. A
switch bridge Ethernet packets at the MAC address level of
the Ethernet protocol transmitting among connected
Ethernet or Fast Ethernet LAN segments.
Switching is a cost-effective way of increasing the total
network capacity available to users on a local area network.
A switch increases capacity and decreases network loading
by dividing a local area network into different segments,
which don't compete with each other for network
transmission capacity.
The switch acts as a high-speed selective bridge between the
individual segments. The switch automatically forwards
traffic from one segment to another without interfering
with any other segments. This multiplies the total network
capacity while maintaining the same network cabling and
adapter cards.
For Fast Ethernet networks, a switch is an effective way of
eliminating problems of chaining hubs beyond the "tworepeater limit." A switch can be used to split parts of the
network into different collision domains, making it possible
to expand your Fast Ethernet network beyond the
205-meter network diameter limit for 100BASE-TX
networks. Switches supporting both traditional 10Mbps
Ethernet and 100Mbps Fast Ethernet are also ideal for
bridging existing 10Mbps networks with the new 100Mbps
networks.
Switching LAN technology is a marked improvement over
the previous generation of network bridges, which were
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characterized by higher latencies. Routers are also used to
segment LANs. However, since routers are expensive,
difficult to setup, and require intensive maintenance, they
are relatively impractical for the network. Switches, on the
other hand, are less expensive, easier to set up, and
practically maintenance free, which make them an ideal
solution to today's LAN congestion problems.
Features
The Switch is designed for easy installation and high
performance in an environment where traffic on the
network and the number of user increase continuously.
The Switch, with its rack size, is designed for middle- to
large -sized workgroups. The Switch provides immediate
access to a rapidly growing network through a wide range
of user-reliable functions.
The Switch is ideal for deployment with multiple high-speed
servers for shared bandwidth 10Mbps or 100Mbps
workgroups. With the highest bandwidth 200 Mbps
(100Mbps full-duplex mode), any port can provide
workstations with a congestion-free data pipe for
simultaneous access to the server.
The Switch is expandable by cascading two or more
switches together. Since all ports support 200Mbps, the
Switch can be cascaded from any port and to any number of
switches.
The Switch is a perfect choice for site planning to upgrade to
Fast Ethernet in the future. Ethernet workgroups can
connect to the Switch now, and change adapters and hubs
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anytime later without needing to change the Switch or
reconfigure the network.
The Switch combine dynamic memory allocation with storeand-forward switching to ensure that the buffer is
effectively allocated for each port, while controlling the data
flow between the transmit and receive nodes to guarantee
against all possible packet loss.
The Switch is an unmanaged 10/100 Fast Ethernet Switch
that offers solutions in accelerating small Ethernet
workgroup bandwidth. Other key features are:
• 24-port 10/100Mbps Ethernet Switch with RJ-45
connectors
• Support auto-negotiation for speed and duplex modes
for each port
• Supports auto-MDI/MDI-X for each port
• Wire speed reception and transmission
• Store-and-Forward switching method
• Integrated address look-up engine, supports 8K
absolute MAC addresses
• Supports 2.5-Mbits RAM for data buffering
• Front-panel diagnostic LEDs
• IEEE 802.3x flow control for full-duplex
• Back pressure flow control for half-duplex
• Standard 19" Rack-mountable size
Unpacking & Installation
This chapter provides unpacking and setup information for
the Switch.
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Unpacking
Open the shipping cartons of the Switch and carefully
unpacks its contents. The carton should contain the
following items:
• One the 24-port 10/100Mbps Fast Ethernet Switch
• One AC power cord, suitable for your area's electrical
power connections
• Four rubber feet for shock cushioning
• Screws and two mounting brackets
• This User Guide
If any item is missing or damaged, contact your local
reseller for replacement.
Installation
The site where you install the Switch stack may greatly
affect its performance. Use the following guidelines when
installing the Switch.
• Install the Switch in a cool and dry place. See
Specifications for the acceptable temperature and
humidity operating ranges.
• Install the Switch in a site free from strong
electromagnetic field generators (such as motors),
vibration, dust, and direct exposure to sunlight.
• Leave at least 10 cm of space at the front and rear of the
hub for ventilation.
• Install the Switch on a sturdy, level surface that can
support its weight, or in an EIA standard-size
equipment rack. For information on rack installation,
see the Rack Mounting section.
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When installing the Switch on a level surface, attach the
rubber feet to the bottom of each device. The rubber feet
cushion the hub and protect the hub case from scratching.
Rack Mounting
The switch can be mounted in an EIA standard-size, 19-inch
rack, which can be placed in a wiring closet with other
equipment. Attach the mounting brackets at the switch's
front panel (one on each side), and secure them with the
provided screws (see Figure 1).
Figure 1. Attach Brackets to Switch
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Then, use screws provided with the equipment rack to
mount each switch in the rack (see Figure 2).
Figure 2. Attach Switch to Rack
External Components
This section identifies all the major external components of
the switch.
Front Panel
Figure 3 shows the front panels of the switch.
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9 101112
21 22 23 24
5678
17 18 19 20
1234
13 14 15 16
ACT
LINK
100 Mbps
LEDs Ports
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Power
Figure 3. Switch Front Panel
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LED Indicator Panel
Figure 4 shows the Switch’s LED panel.
Figure 4. LED Panel
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Power
LINK
100 Mbps
ACT
The LED indicator panel contains the following indicators:
Power (PWR)Power (PWR)
•
Power (PWR)This indicator lights green when the
Power (PWR)Power (PWR)
switch is receiving power. Otherwise, it is off.
Link/Activity (green)Link/Activity (green)
•
Link/Activity (green)This indicator lights up green
Link/Activity (green)Link/Activity (green)
when the port is connected to a Fast Ethernet or
Ethernet station. If this indicator is blinking green, the
Switch is transmitting or receiving data.
100 Mbps (green)100 Mbps (green)
•
100 Mbps (green)This indicator lights up green when
100 Mbps (green)100 Mbps (green)
the port is connected to a 100-Mbps Fast Ethernet
station. Otherwise, the LED is off when the port is
connected to a 10-Mbps Ethernet station.
Twisted-Pair Ports
Twisted-pair ports support automatic MDI/MDIX crossover
detection function gives true 'plug and play' capability
without the need of confusing crossover cables or crossover
ports.
With the Auto-MDI function, you just need to plug-in the
network cable to the hub directly and no need to care if the
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end node is Network Interface Card (NIC) or switches and
hubs.
Rear Panel
The AC power connector is located on the rear panel and is
a three-pronged connector that supports the power cord
(see Figure 5). Plug in the female connector of the provided
power cord into this connector, and the male into a power
outlet. The Switch supports input voltages from 100 to
240 AC at 50 to 60 Hz.
Figure 5. AC Power Connector
Rear of Switch
AC Power Connector
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Technical Specifications
Tables 1 to 3 provide Switch specifications.
Table 1. General Specifications
DescriptionFeature
Standards
Protocol
Data transfer
rate
Topology
Network
cables
Number of
ports
IEEE 802.3 10 Base-T ethernet
IEEE 802.3a 100 Base-TX fast ethernet
CSMA/CD
Ethernet: 10 Mbps (half duplex), 20 Mbps (full duplex)
Fast ethernet: 100 Mbps (half duplex), 200 Mbps
(full duplex)
Star
10 Base-T: Two-pair UTP Cat. 3, 4, 5; EIA/TIA-568
100-Ω STP
100 Base-TX: Two-pair UTP Cat. 5; EIA/TIA-568
100-Ω STP
24 × 10/100 Mbps auto-MDI/MDI-X ports
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Table 2. Physical & Environmental Specifications
SpecificationFeature
AC inputs
Power
consumption
Temperature
Humidity
Dimensions
EMI
100 to 240 VAC, 50- or 60-Hz internal universal power
supply
6.4 watts (maximum)
Operating: 0˚ to 40˚ C
Storage: −10˚ to 70˚ C
Operating: 10 to 90%
Storage: 5 to 90%
440 x 140 x 44 mm (W × H × D)
FCC Class B, CE Mark Class B, VCCI Class B
CUL, CBSafety
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Table 3. Performance Specifications
SpecificationFeature
Transmission
method
RAM buffer
Filtering
address table
Packet filtering/
forwarding rate
MAC address
learning
Store-and-forward
512 Kbytes per device
8K entries per device
10Mbps ethernet: 14,880/pps
100Mbps fast ethernet: 148,800/pps
Automatic update
Technical Support
E-mail: support@airlinkplus.com
Toll Free: 1-888-746-3238
Web Site: www.airlinkplus.com
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Copyright 2003 AirLink+. All rights reserved. AirLink+, the stylized AirLink+ logo,
specific product designations, and all other words and logos that are identified as
trademarks and/or service marks are, unless noted otherwise, the trademarks and service
marks of AirLink+. All other product or service names are the property of their respective
holders. AirLink+ products are protected under numerous U.S. and foreign patents and
pending applications, maskwork rights, and copyrights.
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