2N BRI Lite/Enterprise v1.3 User Manual
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Voice parameters of GSM modules
Set the voice level in the gateway GSM modules.
Audio level DSP
Set the voice level for calls in the gateway signal processor.
Caution
An extremely high voice level may lead to poor voice quality
(distortion, echo, etc.) and wrong DTMF detection!
Tone generated for incoming calls from GSM/UMTS
Dial tone – set the dial tone for incoming calls from GSM/UMTS.
Ring tone – set the ring tone for incoming calls from GSM/UMTS.
Generate busy tone to GSM/UMTS – enable busy tone generation for call
termination.
Caution
If the
function is enabled, the duration of
Generate busy tone
outgoing calls billed by the GSM/UMTS provider will be
extended!
Error GSM/UMTS causes
Set the ISDN release cause for each of the below mentioned statuses. Every call
that meets any of the below mentioned requirements, will be rejected with a user
defined cause (the ISDN cause number will be translated to VoIP as a SIP code
as defined below).
Lack of digits in OVERLAP mode – any call that fails to meet the minimum
digits count requirement will be rejected.
Restricted number prefix – any call whose prefix is not included in any of
the prefix lists will be rejected.
Selected module / GSM group is not ready – a call will be rejected in case
there is no available GSM module in the selected (by LCR) outgoing GSM
group.
Selected module / GSM groups are not ready – a call will be rejected in
case there is no available GSM module in the selected (by LCR) outgoing
GSM groups.
Cause translation
The release cause received from GSM/UMTS can be converted into another ISDN
release cause. The resultant ISDN cause number will be converted into a SIP code
according to the table below:
Conversion table: