Amer.com SD7fx1 User manual

SD7fx1 8-Port 10/100
Switch with Fiber Port
User’s Guide
Version 1.0
P/N:ATSD7fx1-0107 Rev.A
This User's Guide contains important information
regarding the installation of your switch. Please read
it completely before beginning installation.
For futurereference,recordtheserialnumber
of your network switch in the space below:
SERIALnumber
Theserialnumberislocatedonthebottomoftheswitch.

Amer.com
7259 Bryan Dairy Road, Largo, FL 33777
© Amer.com Corp., 1997-2001 All rights reserved. No part of this
publication 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 Amer.com, as stipulated by the United States
Copyright Act of 1976.
Amer.com reserves the right to make changes to this document and the
products which it describes without notice. Amer.com shall not be liable
for technical or editorial errors or omissions made herein; nor for
incidental or consequential damages resulting from the furnishing,
performance, or use of this material.
Amer.com is a registered trademark of Amer.com. All other trademarks
and trade names are properties of their owners.
FCC Class A Certification Statement
Model SR16n FCC Class A
This device complies with Part 15 of the FCC rules. Operation is
subject to the following two conditions: (1)This device may not cause
harmful interference, and (2)This device must accept any interference
received, including interference that may cause undesired operation.
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 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 the
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.
??Increase the separation between the equipment and receiver.
??Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected to.
??Consult the dealer or an experienced radio/TV technician for help.
Shielded interface cables must be used in order to comply with
emission limits. You are cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void
your authority to operate the equipment. For more information please
contact the Federal Communication Commission.
CE Mark Class A Statement In a domestic environment, this product
may cause radio interference in which case the user may be required to
take adequate measures.

TABLE OF CONTENTS
ABOUT THIS GUIDE.....................................................1
PURPOSE......................................................................1
TERMS/USAGE............................................................1
OVERVIEW OF THIS USER’S GUIDE ...........................1
INTRODUCTION...........................................................2
FAST ETHERNET TECHNOLOGY.................................2
SWITCHING TECHNOLOGY .........................................3
FEATURES ...................................................................4
UNPACKINGANDSETUP.............................................6
UNPACKING ................................................................6
SETUP ..........................................................................6
IDENTIFYING EXTERNAL COMPONENTS .................7
FRONT PANEL .............................................................7
REAR PANEL...............................................................8
TECHNICALSPECIFICATIONS ...................................9

1
ABOUT THIS GUIDE
Congratulations on your purchase of the 8-Port 10/100Mbps
NWay Ethernet Switch. This device integrates 100Mbps Fast
Ethernet and 10Mbps Ethernet network capabilities in a highly
flexible desktop package.
Purpose
This manual discusses how to install your 8-Port10/100Mbps
NWay Ethernet Switch.
Terms/Usage”
In this guide, the term “Switch ” (first letter upper case) refers
to your 8-Port 10/100Mbps NWay Ethernet Switch, and
“switch” (first letter lower case) refers to other Ethernet
switches.
Overview of this User’s Guide
Introduction. Describes the Switch and its features.
Unpacking and Setup. Helps you get started with the basic
installation of the Switch.
Identifying External Components. Describes the front panel,
rear panel and LED indicators of the Switch.
Connecting the Switch. Tells how you can connect the Switch
to your Ethernet network.
Technical Specifications. Lists the technical (general, physical
and environmental, and performance) specificatio ns of the
Switch.
RJ-45 Pin Specification. Describes the RJ-45 receptacle /
connector and the straight and crossover cable connector.

2
INTRODUCTION
This chapter describes the features of the Switch and some
background information about Ethernet/Fast Ethernet
switchingtechnology.
Fast Ethernet Technology
The growing importance of 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 straight
forward upgrade and takes advantage of the existing
investment in hardware, software, and personnel training.

3
Switching Technology
Another approach to pushing beyond the limits of Ethernet
technology is the development of switching technology. A
switch bridges 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 do
not compete with each other for network transmission capacity.
The switch acts as a high-speed selective bridge between the
individual segments. The switch, without interfering with any
other segments, automatically forwards traffic that needs to go
from one segment to another. By doing this the total network
capacity is multiplied, while still 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 between the existing
10Mbps networks and the new 100Mbps networks.
Switching LAN technology is a marked improvement over the
previous generation of network bridges, which were

4
characterized by higher latencies. Routers have also been used
to segment local area networks, but the cost of a router, and the
setup and maintenance required, make routers relatively
impractical. Today switches are an ideal solution to most kinds
of local area network congestion problems.
Features
The Switch was designed for easy installation and high
performance in an environment where traffic on the network
and the number of users increase continuously.
The Switch with its small, compact size was specifically
designed for small to middle workgroups. This Switch can be
installed where space is limited; moreover, they provide
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 200Mbps (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. As 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 anytime later
without needing to change the Switches or reconfigure the
network.
The Switch combines 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

5
the transmit and receive nodes to guarantee against all possible
packet loss.
The Switch is a managed 10/100 Fast Ethernet Switch that
offers solutions in accelerating small Ethernet workgroup
bandwidth. Other key features are:
? ? Supports one 100BASE-FX multimode fiber port for
long distance connection, up to 2km in full-duplexmode.
? ? Supports seven 10/100Mbps NWay Ethernet RJ-45MDI-
X ports.
? ? Store and forward switching scheme capability. As the
result of complete frame checking and error frame
filtering, this scheme prevents error packages from
transmitting among segments.
? ? NWay Auto-negotiation for RJ-45 ports (port-2 ~ port-8).
This allows for auto-sensing of speed (10/100Mbps)
thereby providing you with automatic and flexible
solutions in your network connections.
? ? Flow control for any port. This minimizes dropped
packets by sending out collision signals when the port’s
receiving buffer is full. Note that flow control is only
available in half duplex mode.
? ? Data forwarding rate per port is at wire-speed for
100Mbps and 10Mbps speed.
? ? Data filteringrate eliminates all error packets, runts, etc.,
per port at wire-speed for 100Mbps and 10Mbps speed.
? ? 8K MAC address entries table per device for the Switch.
? ? 256 KB RAM buffer per device for the Switch.