Cabletron Systems TRXI-44 User Manual

Page 3-16

When connecting a fiber optic link segment to the TPIM-F2 or 
TPIM-F3 keep the following in mind:

•

If you are connecting a fiber optic link segment with ST 
connectors to a TPIM-F2 with ST ports, keep in mind that ST 
connectors attach to ST ports much like BNC connectors attach 
to BNC ports. The connector is inserted into the port with the 
alignment key on the connector inserted into the alignment slot 
on the port. The connector is then turned to lock it down. 

•

The physical communication link consists of two strands of 
fiber optic cabling: the Transmit (TX) and the Receive (RX). The 
Transmit strand from the applicable port on the module will be 
connected to the Receive port of a fiber optic device at the other 
end of the segment. For example, TX of the applicable port on 
the module will go to RX of the other fiber optic device. The 
Receive strand of the applicable port on the module will be 
connected to the Transmit port of the fiber optic device. For 
example, RX of the applicable port on the module will go to TX 
of the other fiber optic device. 

It is recommended that you label the fiber optic cable to 
indicate which fiber is Receive and which is Transmit. When 
you buy fiber optic cable from Cabletron Systems, it is labeled 
so that: at one end of the cable, one fiber is labeled 1, and the 
other fiber is labeled 2. This pattern is repeated at the other 
end of the cable. If you did not purchase your cable from 
Cabletron Systems, be sure you have labeled your cable in the 
manner described above.