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Isolating faulty keys
Perform the following procedure if you suspect faulty key operation or if
the display is behaving strangely.
1.
Disconnect the RJ-45 connector from the bottom of the telephone.
2.
After ten seconds, plug the RJ-45 connector back into the telephone.
Note: Always wait at least 10 seconds between disconnecting a
telephone and reconnecting a telephone on the same loop.
Press ® and ˙ simultaneously within four seconds of reconnecting the
3.
power.
4.
Press BootROM or MainROM (select the mode you used to initially
program the telephone).
Press more... until you see Test on the display.
5.
Press Test .
6.
Press Digital .
7.
Press Display . The display clears for 2 seconds, all elements
8.
(pixels) darken for 4 seconds, then the Digital test display returns.
Press Ind/Key . The display clears except for the Exit softkey.
9.
Optional equipment
M5317TX and CustomNet Installation Guide
55
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