Rj21 - Cabletron Systems 100BASE-FX Cabling Manual

Connecting and Terminating
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To remove the RJ45 connector from the port once it is locked in, grasp the cable
where it enters the network device. Using your finger or a non-conductive probe,
pinch the exposed arm of the locking clip towards the main body of the housing.
When the arm contacts the housing, the locking clip has been disengaged.
Without releasing the arm, gently pull the RJ45 connector directly out of the port.
If the connector will not come out, there may be damage to the locking clip.
Examine the arm of the locking clip. While pressing the arm back toward the shell
of the connector, verify that the clip, located within the port, is being moved. If the
clip is broken, you may need to use a non-conductive probe to disengage the
locking clip.

RJ21

The RJ21 connector is commonly used to make connections to 25-pair UTP
cabling. To connect the RJ21 connector to a port on a module or other device,
follow the procedure below.
1. Align the RJ21 connector with the RJ21 port on the device. The D shape of
14-4
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.
Do not place foreign objects into device ports while they are
connected to a power source.
the connector should align with the D shape of the port. Firmly press the
connector into the port.
Figure 14-3. RJ21 Connector Insertion
1845n45
Ethernet