Airlink101 ASW224 Manuale utente
AirLink101 1
24-Port 10/100Mbps Ethernet Switch User Guide
24-Port 10/100Mbps Fast Ethernet Switch
(Rack Mount)
Model # ASW224
Quick Installation Guide
Ver.2A
24-Port 10/100Mbps Ethernet Switch User Guide
2 AirLink101
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 Temperature⎯If 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 (tMRA).
•Reduced Air Flow⎯Installation of the equipment in a
rack should be such that the amount of air flow
AirLink101 3
24-Port 10/100Mbps Ethernet Switch User Guide
required for safe operation of the equipment is not
compromised.
•Mechanical Loading⎯Mounting of the equipment in
the rack should be such that a hazardous condition is
not achieved due to uneven mechanical loading.
•Circuit Overloading⎯Consideration 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 Earthing⎯Reliable 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).
24-Port 10/100Mbps Ethernet Switch User Guide
4 AirLink101
AirLink101 5
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
24-Port 10/100Mbps Ethernet Switch User Guide
6 AirLink101
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
IntrIntr
IntrIntr
Introductionoduction
oductionoduction
oduction⎯Describes the Switch and its features.
Unpacking and InstallationUnpacking and Installation
Unpacking and InstallationUnpacking and Installation
Unpacking and Installation⎯Helps you get started
with the basic installation of the Switch.
Identifying External ComponentsIdentifying External Components
Identifying External ComponentsIdentifying External Components
Identifying External Components⎯Describes the
Switch’s front panel, rear panel, and LED indicators.
TT
TT
Technical Specificationsechnical Specifications
echnical Specificationsechnical Specifications
echnical Specifications⎯Lists the Switch’s technical
(general, physical and environmental, and
performance) specifications.
AirLink101 7
24-Port 10/100Mbps Ethernet Switch User Guide
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.
24-Port 10/100Mbps Ethernet Switch User Guide
8 AirLink101
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 "two-
repeater 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
AirLink101 9
24-Port 10/100Mbps Ethernet Switch User Guide
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
24-Port 10/100Mbps Ethernet Switch User Guide
10 AirLink101
anytime later without needing to change the Switch or
reconfigure the network.
The Switch combine dynamic memory allocation with store-
and-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.
Indice
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