SMC Networks SMC108DT User manual

EZ Switch 10/100
• 8-Port Fast Ethernet Switch
• 8 10/100 auto-MDI/X ports – connect to PCs or
other switches or hubs
• Plug and Play – nothing to configure,no
crossover cables required
• Auto-negotiation of speed and duplex mode
• Full-duplex support on all ports
• Half- and Full-duplex flow control
• Desktop and wall-mountable
User Guide
SMC108DT

Copyright
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 implica-
tion or otherwise under any patent or patent rights of SMC. SMC
reserves the right to change specifications at any time without notice.
Copyright 2002 by
SMC Networks Inc.
38 Tesla
Irvine, CA. 92618
Phone: [phone]
All rights reserved. Printed in Taiwan
Trademarks:
SMC is a registered trademark; and EZ Switch is a trademark of SMC
Networks, Inc. Other product and company names are trademarks or
registered trademarks of their respective holders.

Limited Warranty
SMC's Limited Warranty
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 dis-
cretion, repair or replace any product not operating as warranted with
a similar or functionally equivalent product, during the applicable war-
ranty 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 prod-
uct 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 dis-
cretion, replace an older product in its product line with one that incor-
porates these newer technologies. At that point, the obsolete product
is discontinued and is no longer an 'Active' SMC product.
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 infor-
mation, or memory data of Customer contained in, stored on, or inte-
grated with any products returned to SMC pursuant to any warranty.
Products returned to SMC should have any customer-installed accesso-
ry 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 num-

ber 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 war-
ranty 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.
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 EXCLU-
SIVE 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 CONDI-
TIONS OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR-
POSE. SMC NEITHER ASSUMES NOR AUTHORIZES ANY OTHER PER-
SON 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 PROD-
UCT 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 ACCI-
DENT, FIRE, LIGHTNING, OR OTHER HAZARD.
LIMITATION OF LIABILITY: IN NO EVENT, WHETHER BASED IN CON-
TRACT 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 BUSI-
NESS, OR OTHER FINANCIAL LOSS ARISING OUT OF OR IN CONNEC-
TION WITH THE SALE, INSTALLATION, MAINTENANCE, USE, PERFOR-
MANCE, FAILURE, OR INTERRUPTION OF ITS PRODUCTS, EVEN IF SMC
OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSI-
BILITY OF SUCH DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WAR-
RANTIES 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 discontinu-
ance from the active SMC price list. Under the limited lifetime warran-
ty, internal and external power supplies, fans, and cables are covered
by a standard one-year warranty from date of purchase.

Compliances
FCC Class B
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 instructions, may cause harmful interference
to radio communications. However, there is no guarantee that the
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 the receiving antenna
. Increase the separation between the equipment and receiver
. Connect the equipment into an outlet on a circuit in a different room
that to which the receiver is connected
. Consult the dealer or an experienced radio/TV technician for help.
Safety Compliance
Underwriters Laboratories Compliance Statement
Important! Before making connections, make sure you have the correct
cord set. Check it (read the label on the cable) against the following:
Operating Voltage
120 Volts
240 Volts (Europe Only)
Cord Set Specifications
UL Listed/CSA certified cord set
Minimum 18 AWG
Type SVT or SJT three conductor cord
Maximum length of 15 feet
Parallel blade, grounding type attach-
ment plug rated 15A, 125V
Cord Set with H05VV-F cord having
three conductors with minimum diam-
eter of 0.75 mm2
IEC-320 receptacle
Male plug rated 10 A, 250V

The unit automatically 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.

TABLE OF CONTENTS
Copyright 2002 by.................................................................................................1
TABLE OF CONTENTS..........................................................................................4
Features and Benefits..........................................................................................5
Top Panel LEDs......................................................................................................6
INSTALLING THE SWITCH....................................................................................7
Selecting a Site......................................................................................................8
Instructions.............................................................................................................8
SAMPLE APPLICATIONS......................................................................................9
Standalone LAN.....................................................................................................9
High-Speed Switch links......................................................................................9
TROUBLESHOOTING...........................................................................................10
Probable Causes...................................................................................................10
Possible Solutions................................................................................................10
CABLES....................................................................................................................11
Cable Specifications.............................................................................................11
Cable Types and Specifications.........................................................................11
Twisted-Pair Cable and Pin Assignments........................................................11
Straight-through RJ-45 Pin Assignment.........................................................11
Connectivity Guidelines.......................................................................................11
Maximum Fast Ethernet Network Diameter..................................................12
SPECIFICATIONS...................................................................................................12
Filtering/Forwarding/Learning Rates..............................................................12
Size..........................................................................................................................12
Weight.....................................................................................................................12
Temperature..........................................................................................................12
Humidity, non-condensing..................................................................................12
Power Requirements...........................................................................................13

ABOUT THE EZ Switch 10/100
The EZSwitch 10/100 SMC108DT is an 8-port Fast Ethernet switch. The
10BASE-T/100BASE-TX ports deliver dedicated 10/100Mbps links to each
attached LAN segment – all with conventional cabling and adapters.
Auto-Negotiation is used to select the optimal communication mode
for each connection. Auto-sensing is used to select the optimal trans-
mission speed for each connection. With store-and-forward switching
and flow control, maximum data integrity is always maintained, even
under heavy loading. Easy installation and reliability make this plug-
and-play switch an ideal choice for smooth Fast Ethernet integration.
Features and Benefits
. Auto-negotiation of half or full duplex, and auto-sensing of transmis-
sion speed, on all ports
. Auto configuration for MDI/MDI-X cable connection allows connec-
tions to servers, workstations, hubs or switches to be made with
straight-through cabling
. ANSI/IEEE802.3u compliance ensures compatibility with standards-
based hubs, switches and cards from any vendor
. store-and-forward switching ensures error-free transmission
. half- and full-duplex flow control prevents packets from being
dropped under heavy loading
. plug-and-play
. ‘At-a-glance’ LEDs for port and system status monitoring
. Desktop and wall mountable

Top Panel LEDs
The top panel of the switch provides a link status LED for each RJ-45
PORT. In addition, the front panel also contains status LEDs for ‘at-a-
glance’ system monitoring. The following table details the functions of
the various kinds of indicators:
LED
LED
Power
RJ-45 Ports
100M
Link/Act
Condition
On Green
On
Off
ON
Status
The switch is receiving
power
Communications have
been set to 100Mbps
Communications have
been set to 10Mbp
The port has estab-
lished a valid network
connection
Port and Switch status LEDs

Rear Panel
The AC power socket and the 8 RJ-45 connectors are located on the
rear panel of the switch.
FDX
Flashing
Off
On
Flashing
OFF
Traffic is passing
through the port
The port has not estab-
lished any network con-
nection.
The port is in full-duplex
mode.
Packet collision is occur-
ring in half-duplex mode.
The port is in half-duplex
mode.

INSTALLING THE SWITCH
The EZSwitch 10/100 can be placed on a desktop or shelf, or installed in
a standard 19-inch equipment rack.
Equipment Checklist
After unpacking the EZSwitch 10/100, check the contents of the box to
be sure you have received the following components:
. EZSwitch 10/100 SMC108DT
. Appropriate AC power cable
. Four rubber feet
. SMC Warranty Registration Card
. This User Guide
Immediately inform your dealer in the event of any incorrect, missing
or damaged parts. If possible, please retain the carton and original
packing materials in case there is a need to return the product.
Please fill out and return the warranty registration card to SMC or reg-
ister on SMC’s Web Site at: www.smc.com.The EZ Switch 10/100 is cov-
ered by a limited lifetime warranty.
Selecting a Site
Be sure to follow the site selection guidelines below when choosing a
location:
. Select a suitable location for the switch:
. It should be accessible for installing, cabling and maintaining
the switch.
. The temperature and humidity should be within the ranges l
isted in the specifications.
. The status LEDs should be clearly visible.
. There should be adequate space (approximately two inches)
on all sides for proper airflow.
. Make sure twisted-pair cable is always routed away from
power lines, fluorescent lighting fixtures and other sources of
electrical interference such as radios and transmitters.
. Make sure that a properly grounded power outlet is within
2.44 meters (8 feet) of the switch and is powered from an
independent circuit breaker. As with any equipment, using a fil
ter or surge suppressor is recommended.

Instructions
1. Positioning the switch: For desktop or shelf mounting, attach the
four adhesive feet to the bottom of the switch. For wall mounting,
please make sure that the hangars are securely attached to the sur-
face, and then mount the switch onto the hangars.
2. Applying power: plug one end of the power cable into the power
receptacle at the back of the switch, and the other end into an appro-
priate electrical outlet. Check the Power LED to be sure power is on.
Note: It is not necessary to power off the switch before connecting or
disconnecting any UTP cables, as these actions will not disrupt the
operation of other devices attached to the switch.
3. Connecting PCs: Connect each PC to an RJ-45 port on the switch
with a straight-through twisted-pair cable segment, maximum 100
meters (328 feet). Using Category 5 cable for all 100Mbps connections.
The EZSwitch 10/100 will support up to 16 PCs. See the ‘Cable
Specifications’ and ‘Connectivity Guidelines’ sections of this guide for
further information.
NOTE: If an attached device does not support auto-negotiation, the
data rate will be sensed automatically and the communication mode
will default to half duplex.
4. Cascading switches and other network devices: All the ports on the
switch support automatic MDI/MDI-X configuration for cable connec-
tions. This allows you to use straight-through cable to connect to other
switches or hubs from any port on the switch. No crossover cables or
other device settings are needed. See the ‘Cable Specifications’ and
‘Connectivity Guidelines’ sections of this guide for further information.

SAMPLE APPLICATIONS
Some typical applications for the EZ Switch 10/100 are illustrated
below:
Standalone LAN
In the figure below, the EZSwitch 10/100 is operating as a collapsed
backbone for a small LAN. It is providing dedicated 10Mbps full-duplex
connections to workstations and 200Mbps full-duplex connections to
power users and servers.
High-Speed Switch links
In this application a 200Mbps full-duplex link is made to a second
EZSwitch10/100.

TROUBLESHOOTING
1.
SSyymmppttoomm
Power LED does not light after power on
Probable cause
Power outlet or power cord may be defective
Possible Solutions
. Check for loose connections.
. Check the power outlet by using it for another device.
. Replace the power cord.
2.
SSyymmppttoomm
Link LED does not light after connection is made.
Probable Causes
Switch port, network card or cable may be defective.
Possible Solutions
. Check that the switch and attached device are both powered
on.
. Be sure the network cable is connected to both devices
. Verify that Category 5 cable is used for 100Mbps connections
and that the length of any cable does not exceed 100 meters
(328 feet). Check the network card and cable connections for
defects.
. Replace the defective card or cable if necessary.

CABLES
Cable Specifications
Twisted-Pair Cable and Pin Assignments
Caution: DO NOT plug a phone jack connector into any RJ-45 port.
Use only twisted-pair cables with RJ-45 connectors that conform to
FCC standards.
For 10BASE-T/100BASE-TX connections, a twisted-pair cable must have
two pairs of wires. Each wire pair is identified by two different colors.
For example, one wire might be red and the other, red with white
stripes. Also, an RJ-45 connector must be attached to both ends of the
cable.
Caution: Each wire pair must be attached to the RJ-45 connectors in a
specific orientation.
10BASE-T/100BASE-TX Pin Assignments
With standard straight-through 10BASE-T/100BASE-TX cable, pins 1 and
2 are used for transmitting data, and pins 3 and 6 for receiving data.
The ‘+’ and ‘-‘ signs in the table below are used to represent the polari-
ty of the wires that make up each wire pair.
Because all ports on this switch support automatic MDI/MDI-X opera-
tion, you can use straight-through cables for all network connections to
PCs or servers, or to other switches or hubs.
Cable Types and Specifications
Cable Type Max. Length Connector
10BASE-T Cat. 3, 4, 5 100- 100m (328 ft) RJ-45
ohm UTP
100BASE-TX Cat. 5 100-ohm 100m (328 ft) RJ-45
UTP
Straight-through RJ-45 Pin Assignment
End 1 End 2
1 (Tx +) 1 (Tx+)
2 (Tx -) 2 (Tx -)
3 (Rx+) 3 (Rx+)
6 (Rx-) 6 (Rx-)

Connectivity Guidelines
When adding hubs (repeaters) to your network, please follow the con-
nectivity rules listed below for Fast Ethernet. However, note that
because switches break up the path for connected devices into sepa-
rate collision domains, you should not include the switch or connected
cabling in your calculations for cascade length involving other devices.
Note: Network diameter is defined as the wire distance between the
two end stations in the same collision domain.
MMaaxxiimmuummFFaassttEEtthheerrnneettNNeettwwoorrkkDDiiaammeetteerr
Repeater Type Twisted Pair Twisted Pair/Fiber
and Number 100BASE-TX 100BASE-TX and FX
1 Class I 200m (656 ft) 260.8 m (855.4 ft)
1 Class II 200m (656 ft.) 308.8 m (1012.6 ft)
2 Class II 205m (672.4 ft) 216.2m (709.1 ft)

SPECIFICATIONS
EZ Switch 10/100
Model
SMC108DT
Ports
8 RJ-45
Network Interface
RJ-45: 100 ohm, UTP cable
10BASE-T – EIA/TIA Categories 3,4 5
100BASE-TX – EIA/TIA Category 5
LEDs
Power- One
Link/Act (Activity) – one per port
10/100 (10/100Mbps) – one per port
FDX/COL (full duplex/collision) one per port
Switching method
Store-and-forward
MAC Address Table
1K entries per system
Memory Buffer
1MB
Filtering/Forwarding/Learning Rates
Full line rate
Size
16.4cm(W) X 10cm(D) x 2.6cm(H)
Weight
0.95 LBs
Temperature
Operating: 0ºC to 45ºC (32ºF to 113ºF)
Storage: -40ºC to 70ºC (-40ºF to 158ºF)
Humidity, non-condensing
10% to 90%
Power Requirements
AC 100~240V 50/60Hz
Power Consumption
4 Watt for 8-Port Switch
Heat Dissipation
45 BTU/hr maximum
Maximum Current
0.5A@110VAC

0.22@240VAC
Standards
IEEE802.3
IEEE802.3u
IEEE802.3x
ISO/IEC8802-3

FOR TECHNICAL SUPPORT, CALL:
From U.S.A. and Canada (24 hours a day, 7 days a week)
(800) SMC-4-YOU; [phone]; fax: [phone]
INTERNET
E-mail addresses:
T[email protected]om
Driver updates:
http://www.smc.com/index.cfm?action=tech support
drivers downloads
World Wide Web:
http://www.smc.com