Kuhnt AS55 Series, Руководство по обслуживанию

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SERVICE MANUAL AS55X
55Xseries_manual_V3.22 (18-08-15) www.kuhnt.com 63
5.6.4 Causes
For most of the ISDN events the use of cause messages are of common value. But some PBX
needs different information for an error free call-setup.

... the called number is not valid
This abort cause will be sent to ISDN if the dialled number is not valid. This case will
occur, if the AS55X failed converting the dialled number from an ISDN number type
to a valid GSM number type.
Default value: Cause 28

...the call-setup should be rejected in case of presence of the CLIP from ISDN
If the call to GSM shall be blocked by the AS55X in the case of presence of the CLIP
from ISDN, the desired abort cause must be entered here.
Default value: No entry, function off

... the requested GSM channel is busy or not registered at the network or the signal
quality is too bad
If the GSM channel, requested by the routing function, is not available, this abort
cause will be sent to ISDN. This case will occur, if no member of the selected GSM
channel group is registered to a GSM network with sufficient signal quality.
Default value: Cause 34

... the call-setup failed before alerting
This can occur, if the called number does not exist, if the called phone is switched off,
if the GSM network is overloaded etc.
Default value: Cause 17

... the call-setup failed before connection:
This can occur, if the called mobile phone has bad RF contact to the GSM network or
if the called subscriber rejects the call.
Default value: Cause 17

... if the call-setup is aborted by busy tone:
Some GSM networks do not terminate the call immediately if the called phone is
busy, they only switch a busy tone to the calling phone. If the AS55X should detect
this busy tone and terminate the call-setup immediately, the desired ISDN cause
must be typed in here.
Default value: No entry, detection off