2N ISDN BRI GSM, Руководство пользователя

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2N - ISDN BRI GSM Enterprise Gateway
•
Few digits on OVERLAP dial mode – the incoming call was
rejected because the number of digits of the calling party's
dialling was too low for successful connection (default = 102
– Recovery on Timer Expiry).
•
Restricted number prefix – call rejection due to an unknown
prefix. The prefix does not match any item in the routing tables
(default = 21 – Call Rejected).
•
Selected module / GSM group is not ready – call rejection due
to the busy status of all modules that have been selected for
routing calls to the particular destination (the module assigned
to the B-channel group is not available) and no other GSM
modules have been selected for the destination (default = 41
– Temporary Failure).
•
No module / GSM group is ready – call rejection due to the
busy status of all modules that have been selected for routing
calls to the particular destination and alternative GSM modules
that have been selected routing calls to the particular
destination in case of congestion (default = 42 – Switching
Equipment Congestion).
Progress elements
The purpose of progress elements is to describe the behaviour of
terminals involved in a connection. You can set here which
progress elements should be sent in the
SETUP_ACKNOWLEDGE, CALL_PROCEEDING, PROGRESS
and ALERTING messages. Please keep the configuration settings
of your PBX or router to avoid false evaluation of the messages
transmitted by your GSM gateway and thus connection
establishing errors. The decadic numbers assigned to progress
elements are included in Tab. 5.
Number Meaning
1 The connection is not of the end-to-end ISDN type, further progress
messages will be sent in the voice band
2 The destination address is not of the ISDN type
3 The connection initiator address is not of the ISDN type
4 The connection returns to the ISDN
8 The communication of the interconnected systems led to a change of the
telecommunication service (for the end-to-end ISDN mode only)
10 Delay due to call interface failure
Tab. 5 –ISDN Cause Meanings
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