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StackMaster™ TX12

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100BASE-TX 12-Port Stackable Hub

1. INTRODUCTION

This guide is intended for the system or network administrator
responsible for installing and monitoring a TRANSITION Networks
StackMasterTX-12 100BASE-TX 12-Port Stackable Hub. A working
knowledge of local area network (LAN) operations, including
familiarity with communications protocols used on interconnected
LANs, is assumed.

The StackMaster TX12 Hub

The StackMasterTX-12 100BASE-TX 12-Port Stackable Hub (SMHB-
E-TX-12) is a Fast Ethernet repeater designed to meet IEEE 802.3u
100BASE-TX standards. 

StackMaster TX12 Hub Features

Twelve RJ-45 100BASE-TX ports for Fast Ethernet
connectivity

Port #12 provides StackMaster TX12-to-StackMaster TX12
MDI/MDI-X uplink option

Optional cascading of hubs using SCSI connectors at back

19-inch rack mountable

Auto partitioning of ports with excessive collisions

Fully automatic preamble regeneration

Internal universal input power supply

The sole purpose of this remedy shall be provided the customer with the replacement or
repair of non-conforming goods in the manner described in this Warranty statement. This
exclusive remedy shall not be deemed to have failed of its essential purpose so long as TN is
willing and able to repair or replace the defective item(s) or refund the purchase price. 

TN reserves the right to inspect products claimed to be defective under warranty either at the
customer’s location or at TN’s plant. TN assumes no liability for liability charges incidental
to the adjustment, service, repairing, removal or replacement of the product, or other costs,
or the expense of repairs made outside of its factory, except when made with TN’s prior
written consent. Additionally, Transition Networks reserves the right to charge for all testing
and shipping incurred, if after testing, a return is classified as “No Problem Found”.

TN’s total liability in connection with the products and their installation to all persons and
from all causes in the aggregate, whether in contract, tort, or strict liability, shall not exceed
the amount paid to TN for the product directly related to the alleged damage. However, in
no event shall TN have any liability to a customer or any third party for products
manufactures according to the customer’s specifications.

C. Return Procedure
The customer must follow this procedure for the return of defective items:

1. Locate the serial number(s) of the item(s) to be returned.
2. Determine the date the item(s) was received.
3. Contact Transition Networks Technical Support to determine if the problem can be

corrected on site.

If not, and the product is covered by warranty, then:

• Call the distributor directly or contact TN.
• Request a Return Material Authorization (RMA).
• Ship the item, prepaid in original packaging to Transition Networks at the above

address.

• Include the RMA number on the outside of the carton and/or on the Packing List.
• Include a copy of the RMA form.
• Include a copy of the original invoice or packing list (if possible) to expedite

processing.

• The item(s) may be shipped by the customer or the distributor.
• Transition Networks will repair or replace the unit, at TN’s discretion, and cover the

cost of the return freight to the distributor or to the customer, whichever requested
the RMA number.

If the item(s) was received more than five years ago, or if the item(s) is no longer covered by
warranty 
for other reasons, then:

• Call the distributor or contact TN.
• Request a Material Repair Authorization number (MRA).
• Ship the item(s), prepaid, in the original packaging to Transition Networks at the

above address.

• Include the MRA number on the outside of the carton add/or on the Packing List.
• Include a copy of the MRA form.
• Include a copy of the original invoice or packing list (if possible) to expedite processing.
• Only the customer (end-user) may send the items(s) to TN.
• TN will contact the customer after the item(s) have been received, inspected, and a

cost estimate of the repair determined.

• The repair charges may be billed, with customer’s approval, though the distributor, or

on a prepaid or C.O.D. basis directly to the customer. The charges will include the
cost of shipping.

The return authorization numbers are valid only for 90 days from the date issued.

Summary of Contents for SMHB-E-TX-12

Page 1: ...Class 1 stacked Class 2 unstacked Physical Dimensions 17 x 10 x 1 8 438 mm x 255 mm x 45 mm Shipping Weight 9 lbs 4 1 kg Input Power Internal universal input 100 240VAC 50 60 Hz 53W AC Input Cord TN...

Page 2: ...permission from TRANSITION Networks Trademark Notice All registered trademarks and trademarks are the property of their respective owners Der Anschluss dieses Ger tes an ein ffentlickes Telekommunika...

Page 3: ...e limited collision domain in 100BASE X use the shortest cables possible to make a connection between any two devices Where collisions are not a consideration full duplex longer cable may be possible...

Page 4: ...ct tort or strict liability shall not exceed the amount paid to TN for the product directly related to the alleged damage However in no event shall TN have any liability to a customer or any third par...

Page 5: ...ERMITTED BY LAW TN DOES NOT MAKE AND DISCLAIMS ALL OTHER WARRANTIES EXCEPT TITLE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY WARRANTY OF DESCRIPTION MERCHANTIBILITY FITNESS FOR A PARTICULAR...

Page 6: ...Contact For assistance in fault isolation and in maintaining the StackMaster TX12 100BASE TX 12 Port Stackable Hub contact Technical Support 800 260 1312 or your local distributor StackMaster TX12 Con...

Page 7: ...ed ERROR Flashing yellow Error detected on port OR port partitioned and isolated 2 SITE CONSIDERATIONS The site for the StackMaster TX12 hub must provide AC power outlet for each hub Adequate ventilat...

Page 8: ...ter TX12 Link Integrity cannot be disabled All devices connected to the StackMaster TX12 MUST have link functions enabled To install the StackMaster TX12 Unpack the StackMaster TX12 Hub Install StackM...

Page 9: ...TX12 between the 19 inch rack mounting rails at the installation position 3 Install two screws through right front bracket and two screws through left front bracket using clip nuts if necessary Connec...

Page 10: ...aster TX12 hub as shown above 5 Continue connecting SCSI cables by repeating steps 3 and 4 until the entire StackMaster TX12 stack is cascaded NOTE The open SCSI connectors at the top and bottom of th...

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