3Com 100BASE-TX DISTANCE EXTENDER User Manual

Lifetime Limited Warranty

The duration of the warranty for the 100BASE-TX Distance Extender Module (3C16683) is lifetime.

Advance hardware exchange is available during the first year from your date of purchase in accordance with 3Com’s standard terms and conditions 

for such service. After the first year, the warranty reverts to 3Com’s standard lifetime limited warranty.

To qualify for the lifetime limited warranty and the advance hardware exchange, you must submit the appropriate product warranty registration card 

to 3Com, otherwise this product will be warranted for a period of one (1) year without advance hardware exchange.

HARDWARE:

   3Com warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the 

following lengths of time from the date of purchase from 3Com or its Authorized Reseller:

Network adapters: 

Lifetime

Other hardware products:

One year unless otherwise specified above

Spare parts and spares kits: 

90 days

If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at its option and expense, repair the defective 

product or part, deliver to Customer an equivalent product or part to replace the defective item, or refund to Customer the purchase price paid for 

the defective product.  All products that are replaced will become the property of 3Com.  Replacement products may be new or reconditioned.  Any 

replaced or repaired product or part has a ninety (90) day warranty or the remainder of the initial warranty period, whichever is longer.

3Com shall not be responsible for any software, firmware, information, or memory data of Customer contained in, stored on, or integrated with any 

products returned to 3Com for repair, whether under warranty or not.

SOFTWARE:

   3Com warrants that the software programs licensed from it will perform in substantial conformance to the program specifications 

therefor for a period of ninety (90) days from the date of purchase from 3Com or its Authorized Reseller.  3Com warrants the media containing 

software against failure during the warranty period.  No updates are provided.  3Com's sole obligation with respect to this express warranty shall be 

(at 3Com's discretion) to refund the purchase price paid by Customer for any defective software products, or to replace any defective media with 

software which substantially conforms to 3Com's applicable published specifications.  Customer assumes responsibility for the selection of the 

appropriate applications program and associated reference materials.  3Com makes no warranty or representation that its software products will 

work in combination with any hardware or applications software products provided by third parties, that the operation of the software products will 

be uninterrupted or error free, or that all defects in the software products will be corrected.  For any third party products listed in the 3Com 

software product documentation or specifications as being compatible, 3Com will make reasonable efforts to provide compatibility, except where the 

non-compatibility is caused by a "bug" or defect in the third party's product.

STANDARD WARRANTY  SERVICE:

   Standard warranty service for hardware products may be obtained by delivering the defective product, 

accompanied by a copy of the dated proof of purchase, to 3Com's Corporate Service Center or to an Authorized 3Com Service Center during the 

applicable warranty period.  Standard warranty service for software products may be obtained by telephoning 3Com's Corporate Ser vice Center or 

an Authorized 3Com Service Center, within the warranty period.  Products returned to 3Com's Corporate Service Center must be pre -authorized by 

3Com with a Return Material Authorization (RMA) number marked on the outside of the package, and sent prepaid, insured, and packaged 

appropriately for safe shipment.  The repaired or replaced item will be shipped to Customer, at 3Com's expense, not later than t hirty (30) days after 

receipt of the defective product by 3Com.

WARRANTIES EXCLUSIVE:

   IF A 3COM PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, CUSTOMER'S SOLE REMEDY FOR BREACH OF THAT 

WARRANTY SHALL BE REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION.  TO THE FULL EXTENT ALLOWED 

BY LAW, THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, TERMS, OR CONDITIONS, 

EXPRESS OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES, TERMS, OR CONDITIONS 

OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND SATISFACTORY QUALITY.  3COM 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.

3COM SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND EXAMINATION DISCLOSE THAT 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 MODIFY, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY ACCIDENT, FIRE, 

LIGHTNING, OR OTHER HAZARD.

LIMITATION OF LIABILITY.

    TO THE FULL EXTENT ALLOWED BY LAW 3COM ALSO EXCLUDES FOR ITSELF AND ITS SUPPLIERS ANY LIABILITY, 

WHETHER BASED IN CONTRACT OR TORT (INCLUDING NEGLIGENCE), FOR INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, OR PUNITIVE 

DAMAGES OF ANY KIND, OR FOR LOSS OF REVENUE OR PROFITS, LOSS OF BUSINESS, LOSS OF INFORMATION OR DATA, 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 3COM OR ITS AUTHORIZED RESELLER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, AND LIMITS ITS 

LIABILITY TO REPAIR, REPLACEMENT, OR REFUND OF THE PURCHASE PRICE PAID, AT 3COM'S OPTION.  THIS DISCLAIMER OF LIABILITY FOR 

DAMAGES WILL NOT BE AFFECTED IF ANY REMEDY PROVIDED HEREIN SHALL FAIL OF ITS ESSENTIAL PURPOSE.

Some countries, states, or provinces do not allow the exclusion or limitation of implied warranties or the limitation of incidental or consequential 

damages for certain products supplied to consumers or the limitation of liability for personal injury, so the above limitations and exclusions may be 

limited in their application to you.  This warranty gives you specific legal rights which may vary depending on local law.

GOVERNING LAW:

   This Limited Warranty shall be governed by the laws of the state of California.

3Com Corporation

, 5400 Bayfront Plaza, Santa Clara, CA, 95052-8145, U.S.A. Tel: (408) 764-5000, 9/1/96

3Com, SuperStack, and Transcend are registered trademarks of 3Com Corporation.

Other brand and product names may be registered trademarks or trademarks of their respective holders.

©  1997 3Com Technologies

Part No. DUA1668-3AAA01

Published October 1997

100BASE-TX

D

ISTANCE

 E

XTENDER

 M

ODULE

U

SER

 G

UIDE

100BASE-TX Distance Extender Module

The 100BASE-TX Distance Extender Module 

(3C16683) is designed for use with 3Com’s 

SuperStack

®

 II Dual Speed Hub 500 12- and 

24-port versions (3C16610 and 3C16611). 

When installed in a Dual Speed Hub 500 unit, the 

Module provides a single 100Mbps Fast Ethernet 

twisted pair 802.1D bridged port. You can use 

this port to provide a high-speed connection, up 

to 100m long, to another segment of your 

network infrastructure, or to a local server or 

endstation.

The Module also enables you to overcome the 

Fast Ethernet network design limitations by 

forming chains of almost limitless numbers of 

hubs; each link of category 5 cable being up to 

100m in length.

This Module operates at half duplex (HD) mode 

only.

Examples of network configurations and more 

information about Fast Ethernet configuration 

rules can be found in the hub’s user guide.

When the Module is fitted in a managed Dual 

Speed Hub 500 unit, it provides traffic statistics, 

link status and duplex mode. You may also enable 

and disable the port.

Technical Specification

Forwarding Rate: 148,800 frames per second.

Forwarding Mode: fragment-free.

Operating temperature: 0–50°C (32–122°F).

Humidity: 0–95% non-condensing.

Power consumption: 5W maximum.

The Module is VLAN and LSA compatible. It filters 

all frames smaller than 64 bytes in size. Frames 

greater than 1522 bytes are forwarded, unless 

there is traffic congestion, when they are rejected. 

It forwards all other traffic, such as normal traffic 

and multicast frames. No address filtering is 

performed.

Standards

Electromagnetic Compatibility

FCC Statement:

This equipment has been tested with a Class A computing device and 

has been found to comply with part 15 of FCC Rules. Operation in a 

residential area may cause unacceptable interference to radio and TV 

receptions requiring the operator to take whatever steps are necessary 

to correct the interference.

CSA Statement:

This Class A digital apparatus meets all requirements of the Canadian 

Interference-causing Equipment Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences 

du Règlement sur le matériel brouilleur du Canada.

.

Handling the Module

CAUTION: 

The Module can easily be 

damaged by electrostatic discharge. 

To prevent damage, please observe the 

following:

■

Do not remove the Module from its 

packaging until you are ready to install it into 

the hub.

■

Do not touch any of the pins, connections or 

components on the Module.

■

Handle the Module only by its edges and 

front panel.

■

Always wear an anti-static wristband 

connected to a suitable earth point.

■

Always store or transport modules in 

appropriate anti-static packaging.

Functional

ISO/IEC 8802-3

IEEE 802.1D

Safety

UL 1950

EN 60950

CSA 22.2 #950

Environmental

EN 60068

EMC

EN55022 Class B

FCC Part 15 Class A

ICES-003 Class A

EN50082-1

AS/NZS 3548 Class B

VCCI Class B