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62
Frequent Problem Sources
You are hearing a Clicking/Breaking after Picking up the Receiver
If this is an analog telephone, the „call charge transmission imme-
diately" has been activated with the configuration program COMset.
You will hear these charge unit pulses for the previous call after
picking up the receiver (particularly, if it was an expensive long dis-
tance call). If your telephone is not able to display charges, this con-
figuration may be obsolete.
Check the curled cord of the receiver for defects.
You are hearing a pulsating Tone (Special Dial Tone) for 2 seconds
after Picking up the Receiver
An automatic dialling has been configured for the telephone. You
can switch this function off, if unwanted.
You are hearing a pulsating Tone (Special Dial Tone) after logging
into a Group
Eventually a group call forwarding has been configured for the
group. You can switch off this function, if unwanted.
You are hearing a pulsating Tone (Special Dial Tone) after Picking
up the Receiver
Eventually a subscriber call forwarding has been configured for the
telephone. You can switch this function off, if unwanted.
Eventually a do-not-disturb service has been configured for the tel-
ephone. You can switch this function off, if unwanted.
Please check, if the filling status of the call data memory has
exceeded 80%. If possible, delete the call data memory entries.
Check, if the type of dial tone has been modified and reconfigure
this modification, if unwanted.
Telephoning impossible
The most important requirement for telephoning is the presence of a dial
tone after picking up the receiver. If this is not the case, the previous
chapter will help you.
If an external call is not possible with your telephone, please check, if
this problem is also existing on other internal telephones or if dialling a
different external number is possible.
Telephoning on the internal S
If you hear the busy tone after picking up the receiver, eventually
both voice channels of the, internal S
later.
Please check on your ISDN telephones, if you have entered the first
MSN as an internal subscriber number. If not, try to correct this
problem. Make sure, that this MSN is presented to the PBX (see
manual of the telephone).
Disconnect the telephone from the PBX for 5 seconds and an even-
tually existing external power supply (Pull the plug). If the problem
is gone, the telephone had a malfunction.
Disconnect the PBX from the external power supply (Pull the plug)
for 5 seconds or press the reset key. If the problem is solved, the
PBX or the telephone had a malfunction.
If an internal S
bus is existing, please check the wiring.
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Check whether you really have configured the corresponding S
port as an internal S
port.
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on page
18).
No external Call possible
If you have this problem only with some internal telephones, please
check the exchange line authorization for these subscribers (config-
uration program COMset).
Port is not possible
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ports are busy. Try again
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(chapter Select internal/external S0 Port
If you have this problem only with some internal telephones, please
check, if there is a call allowance configured for these subscribers
and if the account is empty.
If this problem already happens with the first power-up, please
check whether the right kind of connection was configured for the
external S
ports and modify it if necessary.
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Please check the connection between the NT (NTBA or external S
bus) and the PBX.
Disconnect the PBX from the external power supply (Pull the plug)
for 5 seconds or press the reset key. If the problem is solved, the
PBX or the telephone had a malfunction.
You can check the function of the NT by directly connecting an
ISDN telephone (If you have a Point-to-point ISDN line, the tele-
phone must be compatible to the Point-to-point connection). If there
is still no telephoning possible, disconnect the NT from the external
power supply (Pull the plug) and the exchange line for 5 seconds.
If the problem is solved, the NT had a malfunction. If the problem
remains, contact your network provider for help.
Short-Code Dialling is not possible, external Calls are possible
Eventually no number is stored under the dialled short-code
number or the exchange line access number was added as a prefix.
The Telephone can not be called
Check if your telephone is really not reachable. Try to make a call from
another internal telephone to your telephone.
No internal and external Calls
Eventually a subscriber call forwarding has been configured for the
telephone. You can switch this function off, if unwanted.
Eventually a do-not-disturb service has been configured for the tel-
ephone. You can switch this function off, if unwanted.
Disconnect the telephone from the PBX for 5 seconds and an even-
tually existing external power supply (Pull the plug). If the problem
is solved, the telephone had a malfunction.
Please check if the ringer is deactivated or defective.
Disconnect the PBX from the external power supply (Pull the plug)
for 5 seconds or press the reset key. If the problem is solved, the
PBX or the telephone had a malfunction.
No incoming external Calls, but Calls from internal Telephones are
possible
Eventually a MSN/DDI call forwarding has been configured. You
can switch this function off, if unwanted.
If you did not configure an external ringer rhythm with COMset for
the telephone, no external calls are possible.
If you did not configure an (partial) exchange line access with COM-
set for the telephone, incoming external calls are not possible. Out-
going external calls are also not possible in this case.
Please check the connection between the NT (NTBA or external S
bus) and the PBX.
Disconnect the PBX from the external power supply (Pull the plug)
for 5 seconds or press the reset key. If the problem is solved, the
PBX or the telephone had a malfunction.
You can check the function of the NT by directly connecting an
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ISDN telephone (If you have a Point-to-point ISDN line, the tele-
phone must be compatible to the Point-to-point connection). If there
is still no telephoning possible, disconnect the NT from the external
power supply (Pull the plug) and the exchange line for 5 seconds.
If the problem is solved, the NT had a malfunction. If the problem
remains, contact your network provider for help.
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