Twisted-Pair Test - IBM 5500 Operational, Installation, And Maintenance Manual

Twisted-Pair Test

• Only the yellow light comes on. This indicates that the wires in the cable
are reversed somewhere between the port tester and the 5500 Control
Unit.
• Neither the green nor yellow light comes on. This indicates that there is
no signal on the cable between the port tester and the 5500 Control Unit.
This can also indicate the following:
- The Selector switch is in the wrong position.
- The port tester is attached to the wrong port or cable.
- The attachment to the port or cable is not secure.
• Both the green and yellow lights come on. This indicates that either the
selector switch is in the self-test position or the port tester is not working
correctly.
Step 5. Remove the port tester connector from the cable or port you tested.
Step 6. If the twinax plug was used, put the twinax cable back into the twinax
cable holders.
Step 1. Move the Selector switch to the right (2) position.
Step 2. Attach the appropriate port tester twisted-pair connector to the port or
cable you are testing.
Step 3. Note: If you need the twisted-pair plug, remove it from the cable
compartment located at the bottom of the port tester.
Step 4. Push and hold the test button for 15 seconds or until one of the
following occurs:
• Only the green light comes on. This indicates that the port or cable
between the port tester and the 5500 Control Unit is good.
• Only the yellow light comes on. This indicates that the wires in the cable
are reversed somewhere between the port tester and the 5500 Control
Unit.
• Neither the green nor yellow light comes on. This indicates that there is
no signal on the cable between the port tester and the 5500 Control Unit.
This can also indicate the following:
- The Selector switch is in the wrong position.
- The port tester is attached to the wrong port or cable.
- The attachment to the port or cable is not secure.
• Both the green and yellow lights come on. This indicates that either the
selector switch is in the self-test position or the port tester is not working
correctly.
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