Enterasys Networks BRIM-E6 - Manual (Page 21)

CONNECTING THE BRIM TO THE NETWORK
BRIM-E6 USER’S GUIDE Page 15
3.1.2 Connecting a Fiber Optic Link Segment to an
EPIM-F1, EPIM-F2, or EPIM-F3
When connecting a fiber optic link segment to an EPIM-F1, F2, or F3
keep the following in mind:
• If you are connecting a fiber optic link segment with SMA 906
connectors to an EPIM-F1 with SMA ports, ensure that half
alignment sleeves are in place on each connector. A full alignment
sleeve will damage the receive port. SMA 905 connectors do not
need alignment sleeves.
• If you are connecting a fiber optic link segment with ST connectors
to an EPIM-F2 /F3 with ST ports, keep in mind that ST connectors
attach to ST ports much like BNC connectors attach to BNC ports.
Insert 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.