Module Problems

7Go 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.

8Using the diagonal pliers or wire strippers, cutoff 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.

9Attach the handset’s clips, which extend from the base, to the exposed wires of the patch cord.

10Set the switch on the side of the handset to MONITOR.

11Listen to the handset for the tone device signal.

If you hear the signal, you have found the correct wires. Correctly label both the cross-connect field and the outlet.

If you don’t 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.

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 Release 3.0 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. The first circuit module to include this feature is the 800 GS/LS-lD.

4-60Control Unit Problems

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AT&T 3.0 manual Upgrading Circuit Module Firmware