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Chap5 Maintenance&Troubleshooting
5.1 Outgoing calls can’t be made
1). C.O. line is set to special Extension;
2). Extension hangs up improperly;
3). CPU and internal data is disorder caused by unstable power.
4). Call restriction class is 6.
5.2 Outside calls can’t dial in
1). The conjunction of C.O. line loose;
2). C.O. line was connected to other equipment;
3). No message recording at auto-operator mode.
5.3 Intercom can’t be made
1). Extension hangs up improperly;
2). Extension number wrong.
BREAKDOWN CAUSE SOLUTION
Running
light malfunction
Power off
Check the power socket and
Power supply
No sound
from extension
Disconnected wiring or
malfunction of telephone.
Reconnect the wiring or try to
remove the telephone’s failure
Bad connection Screw down the joint
Cacophony
The distributing of line is
not reasonable
Leave telephone from the
disturbing source
Bad tone
Mix using of non-standard
telephones
Use the standard telephones
No incoming
Devoid function
Of incoming telephone
display
Write application
to telecommunication office
telephone display Wrong setting
of No-disturbing and it
status.
Rescind the No-disturbing and
set incoming telephone display
Exterior line disconnected Connect to the exterior line
Dial-out malfunction
Exterior line is
not connected well
Check whether the line is
connected well
Limited calling time Time limited Rescind the limit
Cannot program the
telephone
Wrong coding
Check the programming
extension and use the right
code
Others Others Refer to professional
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