Lucent Technologies MERLIN LEGEND Release 5.0 Maintenance And Troubleshooting Manual page 156

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting 555-650-140
Control Unit Problems
Module Problems
Take the telephone handset and a 4-pair patch cord to the

cross-connect field between the control unit and the telephone.
Go to the blue field on the cross-connect field and, starting at the

top left corner, push the patch cord onto the first connecting block.
Using the diagonal pliers or wire strippers, cut off the other end of

the patch cord and expose the pairs.
Do not cut out too much of the cord, because you need the length to test
the top rows of the cross-connect field.
Attach the handset's clips, which extend from the base, to the

exposed wires of the patch cord.
Set the switch on the side of the handset to MONITOR.

Listen to the handset for the tone device signal.

Upgrading Circuit Module Firmware
Beginning with Release 3.0, MERLIN LEGEND Communications System allows
upgrades or reinstallation of circuit module firmware through the PCMCIA
interface slot on the processor module. The interface slot is a standard interface
through which information may be added to or retrieved from the system.
Circuit modules introduced with Release 3.0 or later may use flash ROM to
retain circuit module firmware. Unlike traditional ROMs, flash ROM can be
written and erased without being removed from the circuit module. As of
If you hear the signal, you have found the correct wires. Correctly
label both the cross-connect field and the outlet.
If you do not hear the signal, remove the patch cord from the
connecting block and push the patch cord down onto the
connecting block to the right of the one just tested. Keep moving
the patch cord to the next connector block on the right until you
find the pairs that carry the tone device signal.
Issue 1
June 1997
Page 4-66