Telephone Service Problems; Troubleshooting - Cortelco 8780 Instruction Manual

TELEPHONE SERVICE PROBLEMS

If you have any problems with your telephone equipment service,
determine if the problem is with your unit or the telephone company lines.
BEFORE CALLING THE TELEPHONE COMPANY. Be aware that they may
charge you for a service call if the problem is caused by your telephone
equipment.
PHONE DOES NOT RING
Line cord is disconnected at telephone outlet or at telephone end.
•
Phone is OFF HOOK. Make certain the hookswitch is depressed
•
when the handset is in the cradle.
SPEAKERPHONE is on. Turn off speakerphone.
•
NO DIAL TONE
Wire is disconnected at telephone jack or at wall jack. Test the
•
telephone in a different wall jack. If it works, the first jack may be
defective.
HAVE DIAL TONE BUT CANNOT DIAL OUT
Incorrect dialing mode. Switch to DTMF or PULSE mode as
•
needed.
BLANK SCREEN
Since this unit is line powered, the screen is blank while not on a
•
call.
CALLERS ARE NOT DISPLAYED ON THE SCREEN
Verify that you have subscribed to the appropriate service (Caller
•
ID and Call Waiting Caller ID) from your telephone company. If
you only subscribed to Caller ID service this unit will not display
the call waiting caller ID information.
Check if your answering machine is set to answer the call before 2
•
rings.
Always disconnect all the telephone cords, and then reinstall the unit step
by step per this instruction manual before asking for service.

TROUBLESHOOTING

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