SMC Networks EZ Networking SMC-EZ108FDT User manual

EZ
Swi

38 Tesla
Irvine, CA 92618
Phone: [phone]
EZ Switch 10/100
Installation Guide
From SMC EZ line of low-cost workgroup LAN solutions
Sep. 2002
Pub. #150000018700B R01

Information furnished by SMC Networks, Inc. (SMC) is believed to be
accurate and reliable. However, no responsibility is assumed by SMC for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or oth-
erwise under any patent or patent rights of SMC. SMC reserves the right to
change specifications at any time without notice.
Copyright © 2002 by
38 Tesla
Irvine, CA 92618
All rights reserved. Printed in Taiwan
Trademarks:
SMC is a registered trademark; and EZ Switch, TigerStack and TigerSwitch are trademarks of SMC
Networks, Inc. Other product and company names are trademarks or registered trademarks of their
respective holders.

i
L IMITED W ARRANTY
L IMITED W ARRANTY
Limited Warranty Statement: SMC Networks, Inc. (“SMC”) warrants its products to be free
from defects in workmanship and materials, under normal use and service, for the applicable
warranty term. All SMC products carry a standard 90-day limited warranty from the date of
purchase from SMC or its Authorized Reseller. SMC may, at its own discretion, repair or
replace any product not operating as warranted with a similar or functionally equivalent
product, during the applicable warranty term. SMC will endeavor to repair or replace any
product returned under warranty within 30 days of receipt of the product.
The standard limited warranty can be upgraded to a Limited Lifetime* warranty by registering
new products within 30 days of purchase from SMC or its Authorized Reseller. Registration
can be accomplished via the enclosed product registration card or online via the SMC web site.
Failure to register will not affect the standard limited warranty. The Limited Lifetime warranty
covers a product during the Life of that Product, which is defined as the period of time during
which the product is an “Active” SMC product. A product is considered to be “Active” while it
is listed on the current SMC price list. As new technologies emerge, older technologies become
obsolete and SMC will, at its discretion, replace an older product in its product line with one
that incorporates these newer technologies. At that point, the obsolete product is discontinued
and is no longer an “Active” SMC product. A list of discontinued products with their
respective dates of discontinuance can be found at:
http://www.smc.com/index.cfm?action=customer_service_warranty.
All products that are replaced become the property of SMC. Replacement products may be
either new or reconditioned. Any replaced or repaired product carries either a 30-day limited
warranty or the remainder of the initial warranty, whichever is longer. SMC is not responsible
for any custom software or firmware, configuration information, or memory data of Customer
contained in, stored on, or integrated with any products returned to SMC pursuant to any
warranty. Products returned to SMC should have any customer-installed accessory or add-on
components, such as expansion modules, removed prior to returning the product for
replacement. SMC is not responsible for these items if they are returned with the product.
Customers must contact SMC for a Return Material Authorization number prior to returning
any product to SMC. Proof of purchase may be required. Any product returned to SMC
without a valid Return Material Authorization (RMA) number clearly marked on the outside of
the package will be returned to customer at customer’s expense. For warranty claims within
North America, please call our toll-free customer support number at [phone].
Customers are responsible for all shipping charges from their facility to SMC. SMC is
responsible for return shipping charges from SMC to customer.

L IMITED W ARRANTY
ii
WARRANTIES EXCLUSIVE: IF AN SMC PRODUCT DOES NOT OPERATE AS
WARRANTED ABOVE, CUSTOMER’S SOLE REMEDY SHALL BE REPAIR OR
REPLACEMENT OF THE PRODUCT IN QUESTION, AT SMC’S OPTION. THE
FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN
LIEU OF ALL OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED,
EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE,
INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. SMC NEITHER ASSUMES NOR
AUTHORIZES ANY OTHER PERSON TO ASSUME FOR IT ANY OTHER
LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION,
MAINTENANCE OR USE OF ITS PRODUCTS. SMC SHALL NOT BE LIABLE
UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THE
ALLEGED DEFECT IN THE PRODUCT DOES NOT EXIST OR WAS CAUSED BY
CUSTOMER’S OR ANY THIRD PERSON’S MISUSE, NEGLECT, IMPROPER
INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO REPAIR, OR
ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY
ACCIDENT, FIRE, LIGHTNING, OR OTHER HAZARD.
LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CONTRACT
OR TORT (INCLUDING NEGLIGENCE), SHALL SMC BE LIABLE FOR
INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE
DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE, LOSS OF BUSINESS, OR
OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNECTION WITH THE
SALE, INSTALLATION, MAINTENANCE, USE, PERFORMANCE, FAILURE, OR
INTERRUPTION OF ITS PRODUCTS, EVEN IF SMC OR ITS AUTHORIZED
RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES
OR THE LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
CONSUMER PRODUCTS, SO THE ABOVE LIMITATIONS AND EXCLUSIONS
MAY NOT APPLY TO YOU. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, WHICH MAY VARY FROM STATE TO STATE. NOTHING IN THIS
WARRANTY SHALL BE TAKEN TO AFFECT YOUR STATUTORY RIGHTS.
* SMC will provide warranty service for one year following discontinuance from the active
SMC price list. Under the limited lifetime warranty, internal and external power supplies, fans,
and cables are covered by a standard one-year warranty from date of purchase.
SMC Networks, Inc.
38 Tesla
Irvine, CA 92618

T ABLE OF C ONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installing the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Description of Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Mounting the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Stacking Switches on a Flat Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installing a Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
VLAN Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Connecting the Switch System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Making a Connection to an RJ-45 Port . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connecting to a Fiber Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Powering On the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Verifying Port Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Verifying System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Product Spectifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Base Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Switching Criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Traffic Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Media Expansion Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fiber Uplink Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Diagnosing Switch Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power and Cooling Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Port and Cables Assignments . . . . . . . . . . . . . . . . . . . . . . . . . 11
RJ-45 Port Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EMI Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FCC Class B Certification (USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CE Mark Declaration of Conformance . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1
Introduction
This manual describes how to install and use of EZ Switch (SMC-EZ108FDT). It
features 8 10/100Mbps Auto-Negotiation ports with one fiber module switch,
provides the flexibility to fit into your working space with network environment. The
EZ Switch can be served to connect PCs, servers, hubs, bridges, other switches and
routers. It also act as a bridge between 10Mbps and 100Mbps networks segments.
EZ Switch 10/100-108FDT supports 10Mbps and 100Mbps dedicated bandwidths in
each port (excluding fiber module). The device is built with plug & play,
auto-negotiation on all ports, as well as half and full-duplex operations,
store-and-forward transmission scheme, IEEE802.3x flow control and back pressure
operation for easy installation and smooth transition from legacy 10Mbps to
100Mbps switched-network. Each port on the switch supports automatic MDI/MDI-X
detection. This means that you can use either straight-through or crossover cables
to connect to any other network device.
To ensure maximum safety and good funciton, please read carefully and follow all
the directions in this manual to get successful installation and operation. It is
recommended that you should have a basic understanding of Local Area
Networking (LAN) concepts as bridging, IEEE802.3 10BASE-T Ethernet, and
IEEE802.3u 100BASE-TX Fast Ethernet.

Installing the Switch
2
Installing the Switch
Before installing the switch, please verify that you have all the items listed under
“Package Contents”. Also be sure you have all the necessary tools and cabling
before installing the switch.
Package Contents
The SMC-EZ108FDT includes:
Description of Hardware
The base unit contains 8 10BASE-T / 100BASE-TX ports. It also has one slots on
the rear panel for a Fiber optic uplink module with one 100BASE-FX (SC , ST or
MTRJ type single and multi Fiber module) port.
All RJ-45 ports operate at 10 or 100 Mbps, and support auto-negotiation of speed,
duplex mode (i.e., half or full duplex), and flow control. Note that when using
auto-negotiation, speed, transmission mode, or flow control can be automatically set
if this feature is also supported by the attached device.
The base unit also includes a display panel for system and port indications that
simplify installation and network troubleshooting.
The following figure shows the components of this switch:
• 8-port 10/100Mbps and 1-port 100M full duplex fiber Ethernet
Switch
• Four rubber foot pads • This Quick Installation Guide
• AC power cord • Rack mount bracket kit
M1
VLAN
ON OFF
Fiber Slot Power Socket

Installing the Switch
3
Mounting the Switch
This switch can be placed directly on your desktop, or mounted in a rack.
Before you start installing the switch, make sure you can provide the right operating
environment, including power requirements, sufficient physical space, and proximity
to other network devices that are to be connected. Verify the following installation
requirements:
• Power requirements: 100 to 240 VAC (± 10%) at 50 to 60 Hz (± 3Hz). The switch’s
power supply automatically adjusts to the input voltage level.
• The switch should be located in a cool dry place, with at least 10 cm. (4 in.) of space
on the sides for ventilation.
• Place the switch out of direct sunlight, and away from heat sources or areas with a
high amount of electromagnetic interference.
• If you intend to mount the switch in a rack, make sure you have all the necessary
mounting screws, brackets, bolts and nuts, and the right tools.
• Check if network cables and connectors needed for installation are available.
Stacking Switches on a Flat Surface
The SMC-EZ108FDT can be placed anywhere there is enough flat space, such as
on a table or desktop.
1. Stick the self-adhesive rubber foot pads (that come with this package) on each
of the 4 concave spaces located on the bottom of the first switch.
2. Place the first switch on a firm flat surface where you want to install the stack.
3. Repeat step 1 for each switch before stacking them. The rubber foot pads
cushion the switch against shock/vibrations and provide space between each
switch for ventilation.
Installing a Module
The slots on the rear panel are provided for installing fiber optic module . The fiber module
can be used as a uplink to network backbone. You can install a module as described
below:
1. Disconnect power to the switch (modules are not hot-swappable).
2. Remove the face plate on the appropriate slot by removing the two screws with
a flat-head screwdriver.
3. Before opening the package that contains the module, touch the bag to the
switch casing to discharge any potential static electricity.
4. Remove the module from the anti-static shielded bag.
5. Holding the module level, gently push it all the way into the slot along the guide
rails, ensuring that it firmly engages with the connector.
6. If you are sure the module is properly mated with the connector, tighten the
retainer screws to secure the module in the expansion slot.
Caution: The slide-in modules are not hot-swappable. Be sure you power off the switch
before installing any of these modules.

Installing the Switch
4
VLAN Setting:
Located on the rearpanel of this Switch, a VLAN setting toggle switch is provide.By
setting the switch to ON position, following VLAN grouping is activated:
VALN Setting On
Group 1 - Port # 1 and Port #8
Group 2 - Port # 2 and Port #8
Group 3 - Port # 3 and Port #8
Group 4 - Port # 4 and Port #8
Group 5 - Port # 5 and Port #8
Group 6 - Port # 6 and Port #8
Group 7 - Port # 7 and Port #8
Group 8 - Port # 8 and Port #8
By toggling the switch to VLAN OFF position, this switch works in normal operating
mode without any VLAN setting.

Installing the Switch
5
Connecting the Switch System
The SMC-EZ108FDT provides 8 RJ-45 ports on the base unit. Each of these ports
supports connection to 10Mbps Ethernet or 100Mbps Fast Ethernet, and supports
full or half-duplex operation. The transmission speed for each port is automatically
set by the switch to match the highest speed supported by the connected device.
The transmission mode can be set for each port using auto-negotiation .
Making a Connection to an RJ-45 Port
You can use straight-through twisted-pair cable to connect any RJ-45 port on the
switch to any device that uses a standard network interface such as a workstation or
server, or to a network interconnection device such as a bridge or router (depending
on the port type implemented).
1. Prepare the network devices you wish to network. Make sure you have installed
10BASE-T or 100BASE-TX network interface cards for connecting to the
switch’s RJ-45 station ports.
2. Prepare straight-through shielded or unshielded twisted-pair cables with RJ-45
plugs at both ends. Use 100-ohm Category 3, 4 or 5 cable for standard 10Mbps
Ethernet connections, or 100-ohm Category 5 cable for 100Mbps Fast Ethernet
connections.
3. Connect one end of the cable to the RJ-45 port of the network interface card,
and the other end to any available RJ-45 port on the switch. All RJ-45 ports
support 10Mbps and 100Mbps Ethernet connections. When inserting an RJ-45
plug, be sure the tab on the plug clicks into position to ensure that it is properly
seated. Using the switch in a stand-alone configuration, you can network up to
8 end nodes.
Caution: Do not plug a phone jack connector into any
RJ-45 port. This may damage the switch.
Instead, use only twisted-pair cables with RJ-45
connectors that conform with FCC standards.
Notes: 1. When connecting to another compatible switch
or hub, run straight-through cable between
MDI (daisy chain) and MDI-X (station) ports.
You may also attach to MDI-X (station) ports at
both ends if you use crossover cabling. (Refer to “Port and Cable
Assignments” on page 10 for a description of crossover cable).
2. Make sure each twisted-pair cable does not exceed 100 meters (328 feet).
3. We advise using Category 5 cable for all network connections to avoid any
confusion or inconvenience in the future when you upgrade attached devices
to Fast Ethernet.
Restrictions on Cascade Length - The IEEE 802.3 standard recommends restricting
the number of hubs (i.e., repeaters) cascaded via twisted-pair cable to 4; while IEEE
802.3u provides even stricter recommendations for Fast Ethernet. Therefore, when
cascading devices other than this switch, please refer to the accompanying
documentation for cascade restrictions. However, note that because switches break up
the path for connected devices into separate collision domains, you should not include the
switch or connected cabling in your calculations for cascade length involving other devices.

Installing the Switch
6
Connecting to aFiber Optic Port
If you connect fiber cable to a 100Mbps module on the switch, be sure you use an
SC-type or ST or MTRJ connector. When inserting the cable, be sure the tab on the
plug clicks into position to ensure that it is properly seated. If you use an SC-to-ST
converter (for 62.5/125 micron cable only), run cable from the Rx (Tx) port on the
module to the Tx (Rx) port on the target device. The fiber module operates at
100Mbps, Full duplex, and supports flow control. The maximum cable length for
100BASE-FX fiber is as shown in the following table.
Fiber
Transceiver Optical
Wavelength
Maximum
Cable Length
Multimode 1310 nm 2km (1.24 miles)
Single-mode 1310 nm 20 km (12.43 miles)

Installing the Switch
7
Powering On the Switch
1. Plug the power cord into the power socket on the rear of the switch, and the
other end into a power outlet.
2. Check the LED marked Power on the front panel to see if it is on. The unit will
automatically select the setting that matches the connected input voltage.
Therefore, no additional adjustments are necessary when connecting it to any
input voltage within the range marked on the rear panel.
3. The switch performs a self-diagnostic test upon power-on. (Note that this test
takes several minutes to complete.)
Note: The unit supports a “hot remove” feature which permits you to connect or
disconnect twisted-pair or fiber cables without powering off the switch and without
disrupting the operation of the devices attached to the switch.
Verifying Port Status
Check each connection by viewing the port indicators shown in the following table.
Verifying System Operation
Verify that all attached devices have a valid connection. The switch monitors the link
status for each port. If any device is properly connected to the switch and
transmitting a link beat signal, the Link indicator will light up for the corresponding
port. If the Link indicator fails to light when you connect a device to the switch, check
the following items:
• Be sure all network cables and connectors are properly attached to the connected
device and the switch.
• See if your cable is functioning properly by using it for another port and attached
device that displays valid indications when connected to the network.
• Be sure no twisted-pair cable exceeds 100 meters (328 feet).
Label Color Activity Description
Power Green On Power is supplied to the swtich.
Off Power is disconnected.
Link/Act Green On The network port is connected
Blinking Packet transmission or reception is
occurring on the port.
Off The network port is not connected.
100M Green On A valid 100Mbps link is established on
the port.
Off A valid 10Mbps link is established on
the port.
FDX/Col Green On The port operates in full-duplex mode.
Off The port operates in half-duplex mode.
Blinking There’re collisions when packet
transfers.

Installing the Switch
8
Applications
This switch segments your network, significantly increasing both bandwidth and
throughput. Any port on the switch can be attached to a hub (a shared collision
domain) or provide a dedicated link to a single network device (such as a workstation
or server). When a port on the switch is connected to a hub (a 10 or 100 Mbps
repeater), the bandwidth provided by that port is shared by all the devices connected
to the attached hub. However, when a port is connected to an end node or to a
device that breaks up the collision domain (e.g., another switch, bridge or router),
the attached device has access to the full bandwidth provided by that port.
Bridging Functions - This switch provides fully transparent bridging functions.
It automatically learns node addresses, that are subsequently used to filter and
forward all traffic based on the destination address. When traffic passes between
devices attached to the same shared collision domain, those packets are filtered
from the switch. But when traffic must be passed between unique segments (i.e.,
different ports on the switch), the high-speed switching fabric forwards the packets
at near zero latency.
Switching Functions - Store-and-forward switching is used to forward traffic to
other ports. This scheme ensures data integrity and provides a clean data stream.
Flexible Configuration - This switch is not only designed to segment your network,
but also to provide a wide range of options in setting up network connections. It can
be used as a simple stand-alone switch; or connected with standard repeater hubs,
switches, or other network interconnection devices in various configurations.
Media Expansion Options - You can use a fiber module to support applications
such as high-speed file servers, or for connecting to a collapsed fiber backbone
switch.

Product Specifications
9
Product Specifications
Base Unit
Physical Characteristics
Access MethodCSMA/CD
Standards Conformance IEEE 802.3, IEEE 802.3u
Communication Rate 10/100 Mbps
Communication Mode Full or Half duplex
Media Supported 10BASE-T - 100-Ohm Category 3,4,5 twisted-pair
100BASE-TX - 100-Ohm Category 5 twisted-pair
Number of Ports 8 RJ-45 100BASE-TX ports + 1 port Fiber
Indicator PanelSystem: Power; Ports: link/speed/activity, duplex
Dimensions 249.2 x 115.5 x 36.6mm (9.81 x 4.55 x 1.44 Inch)
Weight 0.86 kg (1.89 lbs)
Input PowerFull range: 100 to 240V (±10%), 50 to 60 Hz (±3Hz)
Maximum Current 0.5A
RMS
max.@110V, 0.20A
RMS
max.@240V
Power Consumption 13 Watts max. @ 100-240 VAC
Heat Dissipation 137 BTU/hr max. @ 100-240 VAC
Temperature Operating: -10~65ºC / 32~122ºF,
Storage: -40~70ºC / -40~158ºF
Humidity 5% to 95% (non-condensing)
Certification CE Mark
Emissions FCC Class B, CISPR Class B,BSMI Class B
Immunity IEC 61000-4-2/3/4/6/11
Switching Criteria
Network Bridging Function Filtering, forwarding and learning
Switching Method Store-and-forward
Address Table 2K entries total
Address Resolution Fast hashing scheme
Data Buffer SSRAM 1Mbit
Traffic Control
Flow Control Back pressure for half duplex,
IEEE802.3x for full duplex
Broadcast Suppression Traffic throttled above a critical threshold

Troubleshooting
10
Media Expansion Modules
Fiber Uplink Module
Access MethodCSMA/CD
Standards Conformance IEEE 802.3u
Communication Rate 100Mbps
Communication Mode Full duplex
Media Supported 50/125 micron or 62.5/125 micron multimode fiber,
9/125 micron single-mode fiber
Number of Ports 1 100BASE-FX-SC type port or
1 100BASE-FX- ST type port or
1 100BASE-FX-MTRJ type port
Indicator Panel Included on base unit
Troubleshooting
Diagnosing Switch Indicators
The switch can be easily monitored through panel indicators to assist the network
manager in identifying problems. This section describes common problems you may
encounter and possible solutions.
Symptom:Link indicator does not light up (green) after making a connection.
Cause: Network interface (e.g., a network adapter card on the attached device),
network cable, or switch port is defective.
Solution: Verify that the switch and attached device are powered on. Be sure the
cable is plugged into both the switch and corresponding device. Verify
that the proper cable type is used and its length does not exceed specified
limits. Check the adapter on the attached device and cable connections
for possible defects. Replace the defective adapter or cable if necessary.
Symptom:Power indicator does not light up (green) after power on.
Cause: Defective power outlet, power cord, or internal power supply.
Solution: Check the power outlet by plugging in another device that is functioning
properly. Check the power cord with another device. If these measures
fail to resolve the problem, have the unit’s power supply replaced by a
qualified distributor.
Power and Cooling Problems
If the power indicator does not turn on when the power cord is plugged in, you may
have a problem with the power outlet, power cord, or internal power supply as
explained in the previous section. However, if the unit powers off after running for a
while, check for loose power connections, power losses or surges at the power
outlet, and verify that the fans on the right side of the unit are unobstructed and
running prior to shutdown. If you still cannot isolate the problem, then the internal
power supply may be defective. In this case, contact your distributor for assistance.

Port and Cable Assignments
11
Installation
Verify that all system components have been properly installed. If one or more
components appear to be malfunctioning (e.g., the power cord or network cabling),
test them in an alternate environment where you are sure that all the other
components are functioning properly.
Port and Cable Assignments
RJ-45 Port Description
RJ-45 station ports (all port) can be attached to any devices which use a standard
network interface (e.g., a workstation, server, bridge or router). RJ-45 daisy-chain
ports (all port) can be cascaded to a station port on similar networking devices (e.g.,
another switch or hub). Use unshielded twisted-pair (UTP) or shielded twisted-pair
(STP) cable for RJ-45 connections: 100-ohm Category 3, 4 or 5 cable for 10 Mbps
connections or 100-ohm Category 5 cable for 100 Mbps connections. Also be sure
that the length of any twisted-pair connection does not exceed 100 meters (328 feet).
Schematics for both straight and crossover twisted-pair cable are shown below
Module ordering information:
SMC-EZ108FMSC:100 BASE-FX multimode Module with SC connectors
SMC-EZ108FSSC: 100 BASE-FX singlemode Module with SC connectors
SMC-EZ108FMMT:100 BASE-FX multimode Module with MT-RJ connectors
SMC-EZ108FSMT: 100 BASE-FX singlemode Module with MT-RJ connectors
SMC-EZ108FMVF: 100 BASE-FX multimode Module with VF-45 connectors
Pin Assignment
(Station Ports)
Assignment
(Daisy-Chain Port)
1 Input Receive Data + Output Transmit
Data +
2 Input Receive Data - Output Transmit
Data -
3 Output Transmit
Data +
Input Receive Data +
6 Output Transmit
Data -
Input Receive Data -
4,5,7,
8
Not Used Not Used
Straight-Through Crossover
(Switch) (Adapter) (Switch) (Hub/Switch)
1 IRD+ 1 OTD+ 1 IRD+ 1 IRD+
2 IRD- 2 OTD- 2 IRD- 2 IRD-
3 OTD+ 3 IRD+ 3 OTD+ 3 OTD+
6 OTD- 6 IRD- 6 OTD- 6 OTD-

EMI Certification
12
EMI Certification
FCC Class B Certification (USA)
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following 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.
Warning: This equipment has been tested and found to comply with the limits for a
Class B 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
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from the one which the
receiver is connected to
• Consult the dealer or an experienced radio/TV technician for help
You are cautioned that changes or modifications not expressly approved by the
party responsible for compliance could void your authority to operate the equipment.
Note: In order to maintain compliance with the limits of a Class B digital device,
Accton requires that you use a quality interface cable when connecting to this
device. Changes or modifications not expressly approved by Accton could void your
authority to operate this equipment. Suggested cable type is unshielded or shielded
(UTP/STP) cable - Category 3 or greater for 10Mbps connections, and Category 5
for 100Mbps connections.
CE Mark Declaration of Conformance
This is to certify that this product complies with ISO/IEC Guide 22 and EN45014.
It conforms to the following specifications:
EMC: EN55022(1988)/CISPR-22(1985) Class B
IEC 1000-4-2(1995)4kV CD, 8kV AD
IEC 1000-4-3(1995)3V/m
IEC 1000-4-4(1995)1kV - (power line), 0.5kV - (signal line)
IEC 1000-4-6(1995)3Vrms
This product complies with the requirements of the Low Voltage Directive 73/23/EEC
and the EMC Directive 89/336/EEC.
Warning! Do not plug a phone jack connector in the RJ-45 port. This may damage
this device. Les raccordeurs ne sont pas utilisépour le système téléphonique!