AT&T MERLIN LEGEND Release 3.1 Maintenance And Troubleshooting Manual page 152

Module Problems
6 Restore the module. Lift up the module to disengage it from the rod at the
top of the carrier.
7 Connect the trunk and extension cords.
8 Attach a tag, error printout, or any information that will help identify any
visible problems, failure symptoms, and relevant error reports.
Checking Unlabeled Wiring
If a label is missing or damaged, use a tone device and a telephone handset
to match like wires.
You need the following tools:
Tone device
Telephone handset
Telephone cord with an 8-pin modular plug
4-pair patch cord
Diagonal pliers or wire strippers
To match like wires, follow the steps below.
1 Insert the telephone cord's 8-pin plug into an outlet on the floor area.
2 Using diagonal pliers or wire strippers, cut off the end of the telephone
cord to expose the pairs.
3 Choose a single pair and then untwist the wires.
4 Attach one wire from the pair you have chosen to each clip. The clips
extend from the bottom of the tone device.
5 Turn on the switch on the outside of the tone device.
You hear a high-pitched, alternating signal.
6 Take the telephone handset and a 4-pair patch cord to the cross-connect
field between the control unit and the telephone.
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Control Unit Problems