Cabletron Systems 100BASE-FX, Cabling Manual

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Ethernet 14-5
Connecting and Terminating
2. When the RJ21 connector has been correctly inserted, it should remain in
place naturally. If there are Velcro fastening straps provided, use them to
secure the connector to the port.
If link indicators are present for the ports serviced by the RJ21 connector, check
that they are on. If an indicator is not on, that port does not have a valid link.
Perform each of the following actions until you reach a resolution of the problem
and achieve a link.
• Check that the 10BASE-T device at the other end of the twisted pair segment
is on.
• Verify that the RJ21 connector has the proper pinouts.
• Verify the proper crossover of the cable link between the two devices.
• Examine the punchdown block or patch panel that the UTP cable is connected
to for proper wiring or punchdowns.
• Check the cable for continuity.
• Check that the twisted pair connection meets dB loss and cable specifications
outlined in 10BASE-T Twisted Pair Network Requirements.
• If all else fails, contact Cabletron Systems Technical Support.
To remove the RJ21 connector from the jack, unfasten any locking straps or clips
that are present and pull the connector straight out of the port. Do not rock the
connector from side to side, as damage to the contacts may result.
BNC
The BNC connector is used for connections to 10BASE2 coaxial cable. The
instructions which follow detail the process used to connect a male BNC
connector to a female BNC barrel connector.
Before attaching a male BNC connector to a female BNC barrel connector or
terminator, look into the end of the male connector to verify that the gold contact
pin is present and centered. Any bent or broken pins may not connect properly
and should be replaced.
1. Align the guide channels of the BNC (male) metal housing with the locking
keys of the BNC barrel (female) connector. Slide the metal housing of the
male connector straight over the metal housing of the female connector.
Figure 14-4. BNC Connector Insertion
1845n46