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.

6
UNPACKING AND SETUP
This chapter provides unpacking and setup information for the
Switches.
Unpacking
Open the shipping cartons of the Switch and carefully unpack
its contents. The carton should contain the following items:
One8-Port 10/100Mbps NWay Ethernet Switch
One external power adapter
This User’s Guide
If any item is found missing or damaged, please contact your
supplier for replacement.
Setup
The setup of the Switch can be performed using the following
steps:
? ? The surface must support at least 1.5 Kg for the Switch.
? ? The power outlet should be within 1.82 meters (6 feet) of
the Switch.
? ? Visually inspect the DC power jack and make sure that it
is fully secured to the power adapter.
? ? Make sure that there is proper heat dissipation from and
adequateventilationaround the Switch. Do not place
heavy objects on the Switch.

7
IDENTIFYING EXTERNAL COMPONENTS
This section identifies all the major external components of the
Switch. Both the front and rear panels are shown followed by a
description of each panel feature. The indicator panel is
described in detail in the next chapter.
Front Panel
The figure below shows the front panel of the switch.
LED Indicator Panel
Power Indicator (PWR)
This LED indicator lights green when the hub is receiving
power, otherwise, it is off.
Full-Duplex/Collision (Full-Duplex/Collision)
This LED indicator lights green when a respective port is in
full duplex (FDX) mode. Otherwise, it is blinking when
collisions are occurring on the respective port.
Link/Activity (100M LINK/ACT(green),10LINK/ACT(amber))
This LED indicator lights green when the port is connected to a
100Mbps Fast Ethernet station. The indicator blinks green
when transmitting or receiving data on the 100Mbps network.
The indicator lights amber when the port is connected to a
10Mbps Ethernet station. The indicator blinks amber when
transmitting or receiving data on the 10Mbps network.

8
Rear Panel
8X 7X 6X 5X 4X 3X 2X 1 - FX
TX RX
FDX
5VDC/2.4A
HDX
FX
-
+
10/100Mbps NWay Ethernet MDI-X RJ-45 Ports
100BASE-FX Fiber Port
DC Power Jack
Duplex mode selection switch for fiber port
DC Power Jack: Power is supplied through an external AC
power adapter. Since the switch does not include a power
switch, plugging its power adapter into a power outlet will
immediately power it on.
MDI-X RJ-45 ports: Use these jacks (port-2 ~ port-8) to
connect stations to the hub. These are MDI-X(Medium-
Dependent Interface, Cross-wired) jacks, which means you use
ordinary straight-through twisted-pair cables to connect user
machines and servers to the hub through them. If you need to
connect another device with an MDI-Xjack, such as another
hub or an Ethernet switch, you should use a crossover cable.
100BASE-FX Fiber Port: The Fiber port supports 100BASE-
FX 62.5/125?m multimode fiber. The TX port has to link to
the other ends RX port, and the RX port has to link to the other
ends TX port.
Duplex Mode Switch: The switch selects the operation mode
to run in either full or half duplex mode for 100BASE-FX
(port-1). When FDX is selected, the fiber port will run at full
duplex. On HDX, the fiber will run at half duplex.

9
TECHNICAL SPECIFICATIONS
General
Standards IEEE802.310BASE-T Ethernet
IEEE802.3u100BASE -TXFast Ethernet
ANSI/IEEE Std. 802.3 NWay Auto-negotiation
Protocol CSMA/CD
Data
Transfer
Rate
Ethernet: 10Mbps (half duplex), 20Mbps (full-duplex)
Fast Ethernet:100Mbps (half duplex), 200Mbps(full-duplex)
Topology Star
Network
Cables 10BASET:2 -pair UTP Cat. 3,4,5 (100 m), EIA/TIA-568 100-ohm STP (100 m)
100BASE-TX: 2-pair UTP Cat. 5 (100 m), EIA/TIA-568
100-ohm STP (100 m)
100BASE-FX:62.5/125?m multimode fiber
Numberof
Ports 7x10/100MbpsNWay MDI-X RJ-45Ports
1 x 100BASE-FX Multimode Fiber Port (SC connector)

10
Physical and Environmental
DCinputs 5VDC/2.4A
Power
Consumption 12watts.(max.)
Temperature Operating:0?~ 50?C, Storage:-10?~ 70?C
Humidity Operating: 10% ~ 90%, Storage: 5% ~ 90%
Dimensions 171 x 98 x 29 mm (W x H x D)
EMI: FCC Class B, CE Mark B, VCCI-B
Performance
Transmission
Method:Store-and-forward
RAMBuffer:256KBytesperdevice
Filtering
Address Table: 8K entries per device
Packet
Filtering/Forwar
ding Rate:
10MbpsEthernet:14,880/pps
100Mbps Fast Ethernet: 148,800/pps
MAC Address
Learning:Automatic update

11
Amer.com Warranty Policy
Limited Lifetime Warranty
In the event of a defect in quality or workmanship, Amer.com will repair or replace any
hardware product sold by Amer.com with new or reconditioned parts free of charge in
North America for a limited lifetime period unless otherwise specified on the sales
invoice from the date of original purchase. All removed parts become the property of
Amer.com. All replaced parts assume the original warranty.
This warranty is extended only to the original purchaser. Proof of purchase will be
requiredbeforewarrantyserviceisprovided.
This warranty covers only failures due to defects in quality or workmanship that occur
during normal use. It does not cover damage that occurs in shipment, electrical storms,
floods, dropped or other acts of nature.
This warranty also does not cover any failure that results from accident, misuse, abuse,
neglect, mishandling, misapplication, alteration, faulty installation, modification,
computer virus, improperly installed or faulty software, or service by anyone other than
an Amer.com Service Technician. If there is evidence that the failure was due to user
negligence, Amer.com has the right to void this warranty and or charge normal service
rates for the subject repair.
The limited warranty covers a one (1) year period from date of purchase on Power
Supplies, AC Adapters & Fans, after the 1 year a cost for replacement is applied to all
productsrequiring suchparts.
Amer.com is not responsible for any type of data loss on hard drive or other storage
devices.
Warranty Service can be obtained during the warranty period by shipping, freight
prepaid, or delivering the product to Amer.com in either the original package or a
similar package providing an equal degree of protection. Amer.com will perform the
required service and return the unit to the user (freight prepaid), if applicable, via the
same mode (i.e. ground, air, etc.)

12
Limits and Expectations
Thereare no express warranties except as listed above.
Network products by Amer.com shall not be liable for incidental or consequential
damages resulting from the use of this product. Any future upgrades, including (but not
limited to) hardware and software are not covered by this limited warranty. If a
hardwareproblem with this product develops during the warranty period, you may
contact the Amer.com Service Center at:
Telephone [phone]
Facsimile [phone]
Service Center
Amer.com
7259 Bryan Dairy Road
Largo, Florida
33777
U.S.A.
P/N: 6012-9638007
Printed in Taiwan