Installation guide

TROUBLE ON SEVERAL TELEPHONES
Entire System Down
Symptom: Green Power light on the control unit is off, but there is no power failure.
Possible Cause
Recommended Action
1.
One or more cartridges are
1. Unplug the control unit ac power cord.
inserted improperly.
Remove and securely replace each cartridge.
Reconnect the control unit power cord.
2. Control unit is defective.
2.
If the green Power light remains off, replace
the control unit.
B7-4