Troubleshooting - Auerswald Analog/ISDN Converter Installations- Und Bedienungshandbuch

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Troubleshooting

Troubleshooting
Here some common problems and their possible
causes are listed:
Problem: Dialling fails.
– Possible cause: Dialling tone from the central
office is distorted or delayed.
Solution: Change the setting "Wait for dial tone"
(see page 52).
– Possible cause: Manual dialling is too slowly.
Solution: Increase the value of the "Timeout
after last dialled digit" (see
– Possible cause: Dialling en bloc, e.g. from the
telephone book or the redial list, is not recog-
nised.
Solution: Under "External connections...Analog
connections" adapt the line impedance to the
exchange line or the device connected ahead.
(note the country in brackets).
Problem: Query leads to disconnect.
– Possible cause: Flash time is too long.
Solution: Reduce the value for "Flash time" (see
page 52).
Problem: Interruption of calls.
– Possible cause: Interferences on the line are
recognized as busy tones.
Solution: Deactivate the setting "Busy tone
detection" (see page
Problem: Mailbox access does not work.
– Possible cause: # is not sent to the central
office.
Solution: Activate the function "send #" (see
page 51).
Problem: The telephone rings but you are only
hearing the dial tone after picking up the
receiver.
– Possible cause: The Analog/ISDN Converter is
able to detect the end of an incoming ringing
call, if the pause between the ringing signals is
longer than the maximum duration (this pause is
normally 5 seconds; if you select the "line
impedance" for Denmark it will be 9 seconds). If
the caller is going on hook within this pause the
page 50).
53).
telephone will continue to ring until this time has
been exceeded.
Solution: This problem is of systematic nature
and cannot be solved technically.
Problem: During an outgoing call the display
of the ISDN telephone is switching into the
connection state after a long delay.
– Possible cause: If "Wait for dial tone" and "Busy
tone detection" are activated, the Analog/ISDN
Converter initially tries to detect if the called
partner is busy. This detection method is based
on the detection of tones for analog connec-
tions. After dialling there might be a longer time
necessary to establish the connection itself
(especially for mobile phone or international
calls). So in the first 30 seconds, the tone detec-
tion will be made and after that the "connected"
status will be signalled.
Solution: Shorten the "Waiting time"
and the "Detection time"
Problem: A call partner on hold is disconnect-
ing the call. The busy tone detection is active
but the exchange line connection will not be
disconnected by the Analog/ISDN Converter.
– Possible cause: If you are making an external
call via analog line with your PBX and put this
call on hold the Music on Hold will be sent to the
analog line. If your external call partner on hold
is disconnecting the call in this status, the cen-
tral office will play the busy tone. Now there are
two tones on the line (busy tone and Music on
Hold) which are mixed. The busy tone detection
may not be reliable for this mixture of tones.
Consequently the line will not be disconnected
automatically as expected.
– Solution: It is recommended to fade out the
Music on Hold (which will be played in a loop) at
the end and add 2 seconds o silence. In this
tone of silence the busy tone may be detected
reliably.
(page 52)
(page 52).