Cabletron Systems ETWMIM User Manual page 86

EPIM SPECIFICATIONS
Inert the connector 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 Ethernet 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 Ethernet
device. For example, RX of the applicable port on the module
will go to TX of the other fiber optic device. We recommend 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 label
your cable as described above.
Caution: Do not touch the ends of the fiber optic strands, and do not let
the ends come in contact with dust, dirt, or other contaminants.
Contamination of the ends can cause problems in data transmissions. If
the ends become contaminated, clean them with alcohol using a soft,
clean, lint free cloth.
To connect a fiber optic link segment to an EPIM-F1, EPIM-F2, or an
EPIM-F3:
1. Remove the protective plastic covers from the fiber optic ports on
the applicable port on the module and from the ends of the
connectors on each fiber strand.
2. Attach the fiber labeled 1 to the applicable receive port, labeled RX,
on the module. See Figure A-8.
Page A-16