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Chapter 3: Installation
Page 3-20 NBR-SERIES Installation Guide
3.5.3 Connecting a Fiber Optic Cable to an EPIM-F1/F2
or EPIM-F3
When connecting a fiber optic link segment to an EPIM-F1/F2 or
EPIM-F3 keep the following in mind:
• When connecting a fiber optic link segment with SMA 906 connectors
to an EPIM-F1 with SMA ports, make sure each connector uses half
alignment, NOT full alignment sleeves.
• When connecting a fiber optic link segment with ST connectors to an
EPIM-F2 with ST ports, keep in mind that ST connectors attach to ST
ports. Insert the connector into the port with the alignment key on the
connector inserted into the alignment slot on the port. Turn the
connector 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 a module port connects to the Receive port of a fiber optic
Ethernet device at the other end of the segment (i.e., TX of the
applicable port on the module goes to RX of the other fiber optic
device). The Receive strand of the applicable port on the module
connects to the Transmit port of the fiber optic Ethernet device (i.e.,
RX of the applicable port on the module goes to TX of the other fiber
optic device).
• We recommend that you label the fiber optic cables to indicate Receive
and Transmit ends. Cabletron Systems prelabels its cable. At one end
of the cable, one fiber is labeled 1, and the other fiber is labeled 2. This
pattern repeats at the other end of the cable. If you did not purchase
your cable from Cabletron Systems, be sure to label your cable in this
manner.
!
CAUTION
A full alignment sleeve damages the receive port. SMA 905
connectors do not need alignment sleeves.