Cortelco 2750 Manuale Utente
APPENDIX D
Trouble Shooting Guide
52
2750 User Guide Version 1.3
TROUBLE SHOOTING GUIDE
No Display or Lamps
No Dial Tone
Press soft key “Change” to assign this telephone a station number.
The Intercom does not work
or
or
There is a delay in getting dial tone
There is a delay in getting dial tone
or
Crosstalk or other interference
Make sure that the Ringer is on and that “Do Not Disturb” is off.
Make sure that fresh AAA batteries are installed in base.
The battery icon stays lit in display Make sure that fresh AAA batteries are installed in base.
If you are having problems with your 2740 or 2750 telephone, please review the problems listed below
and their solution. You may call 662-287-5281 and request a technician to work though your problem
and their solution. You may call 662-287-5281 and request a technician to work though your problem
Make sure that the Power Transformer is plugged into an electric
socket not controlled by a wall switch
Check all line connections. If possible check your jack wiring by
testing a non-system telephone at the jack in question. If a
standard telephone does not work, then the local telephone
company lines or your house wiring may be causing the problem
socket not controlled by a wall switch
Check all line connections. If possible check your jack wiring by
testing a non-system telephone at the jack in question. If a
standard telephone does not work, then the local telephone
company lines or your house wiring may be causing the problem
The LED's are Flashing and the
Display reads “Station #??”
There is no dial tone on the
handset, but the speakerphone
works.
Display reads “Station #??”
There is no dial tone on the
handset, but the speakerphone
works.
Replace the handset from another 2750 telephone. If this solves
the problem, then contact Technical Support for assistance.
the problem, then contact Technical Support for assistance.
The problem may be with your installation. Make sure that the
lines are installed correctly and that line 1 is common on all
system telephones.
lines are installed correctly and that line 1 is common on all
system telephones.
The telephone does not show the
status of other telephones
status of other telephones
The cause of this problem may be from outside interference.
Disconnect line one at the cable terminal. If this solves the
problem, then the interference is coming from the telephone
company.
Disconnect line one at the cable terminal. If this solves the
problem, then the interference is coming from the telephone
company.
This problem may also be caused by DSL Microfilters. Never
connect a line that has a DSL Circuit on Line 1.
connect a line that has a DSL Circuit on Line 1.
The Telephone remains on hold
after the call is picked up at
another station.
after the call is picked up at
another station.
The problem may be caused by one defective telephone.
Disconnect one instrument at a time to determine if a particular
telephone is causing the problem
The most common cause of crosstalk is the use of flat cable. Be
sure to use supplied line cords. You must use twisted-pair line
cords.
Disconnect one instrument at a time to determine if a particular
telephone is causing the problem
The most common cause of crosstalk is the use of flat cable. Be
sure to use supplied line cords. You must use twisted-pair line
cords.
The line LED flashes when a call
comes in, but the telephone does
not ring.
The telephone does not operate
during a power outage
comes in, but the telephone does
not ring.
The telephone does not operate
during a power outage
You cannot join a telephone call in
progress
progress
The Call Privacy feature prevents another 2740 or 2750 from
interrupting a call in progress. If you don't want Call Privacy in your
system, then go into system programming on station 01 and turn it
off.
interrupting a call in progress. If you don't want Call Privacy in your
system, then go into system programming on station 01 and turn it
off.
The telephone line status
indicators stay lit, even thought the
line is not in use.
indicators stay lit, even thought the
line is not in use.
If this line is not connected, then program it as unconnected. If
this line is connected and you have dial tone, then adjust loop
voltage detector setting.
this line is connected and you have dial tone, then adjust loop
voltage detector setting.