Table of Contents
Advertisement
INSTALLING THE IRM-2
3.5.2
Connecting to the Network Via the Fiber Optic
Port
When connecting a fiber optic link segment to the IRM-2's Fiber Optic
Ports, you must keep the following in mind:
•
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 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 have labeled your cable in the manner 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 de-natured alcohol
using a soft, clean, lint free cloth.
To connect a fiber optic link segment to an IRM-2's FOIRL Fiber Optic
Ports:
1. Remove the protective plastic covers from the fiber optic ports and
from the ends of the connectors on each fiber strand.
2. Attach the fiber labeled 1 (4, Fig. 3-5) to the receive port, labeled RX
(3), on the module.
3. Attach the fiber labeled 2 (2) to the transmit port, labeled TX (1), on
the module.
3-8
Advertisement
Table of Contents
