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7 If Something Doesn’t Work
90 Telephone Problems
Quick Reference Guide
Telephone Problems
Telephone Problems
Problem... Check this...
Telephone doesn’t ring Ringer volume may be too low.
Do Not Disturb or Call Forwarding may be turned on.
Line Ringing may not be set to Immediate.
Telephone may be faulty; switch telephones and try
again.
If MLC 6 telephone, is Unique Line Ringing (#209)
set to a pattern other than 1?
Display shows only 16
characters per line
Possible power outage; unplug the modular
telephone cord and replug.
Display time and date
aren’t right
Is your system’s clock correct? Use System Date
(#101) and System Time (#103) to set the date and
time.
Caller ID doesn’t work Are you subscribed to Caller ID?
Is the line connected to a module that supports Caller
ID?
Did someone activate Call Coverage? If so, their
extension number will appear.
Telephone Doesn’t Work Is the telephone cord plugged into the right jack on
the bottom of the telephone?
Telephone may need to be reset; unplug the cord,
and with the handset hung up, replug.
Telephone cord may be defective; switch cords and
try again.
Telephone may be defective; switch telephones and
try again.
There may be a problem with the control unit; switch
to a different port and try again.