Cabletron Systems 100BASE-FX, Cabling Manual

Page: 158 / 192

Connecting and Terminating
14-8 Ethernet
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 one fiber to the applicable receive port on the module. Insert the ST
connector into the port with the alignment slot on the connector inserted over
the locking key on the port. Turn the connector clockwise to lock it down
Figure 14-6. ST Connector Insertion
3. Attach the other fiber of the pair to the applicable transmit port on the module.
Use the same procedure for insertion of the ST connector.
4. At the other end of the fiber optic cable, attach the fiber pair to the transmit
and receive ports of the device.
If link indicators are present for the fiber optic connection, check that they are on.
If an indicator is present but not on, that port does not have a valid link. Perform
each of the following steps until you reach a resolution of the problem and
achieve a link.
• Check that the device at the other end of the link is operating.
• Verify proper crossover of the fiber strands. Try swapping the transmit and
receive connections at only one end of the link.
• Verify that the fiber connection meets the dB loss specifications outlined in
Fiber Optic Network Requirements.
If you are still unable to establish a link, attempt to make the connection between
the devices with another fiber optic cable. If this is unsuccessful, contact
Cabletron Systems Technical Support.
!
C AUT IO N
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 cable ends causes problems in data
transmissions. If necessary, clean contaminated cable ends
using alcohol and a soft, clean, lint-free cloth.
1845n48