2N VoiceBlue Next v3.4 User Manual
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Audio level DSP
Here you can set the voice level for calls in the signal processor of the GSM gateway.
Output audio level DSP [dB] – audio volume gain/loss to VoIP
Input audio level DSP [dB] – audio volume gain/loss to GSM
Caution
An excessively high volume may deteriorate the voice quality
(distortion, echo, etc.) and wrong DTMF detection!
Tone generated for incoming calls from GSM/UMTS
Dialtone – the dialtone type for GSM/UMTS incoming calls.
Ring tone – the ringing tone type for GSM/UMTS incoming calls.
Generate busy tone to GSM/UMTS – generation of the busy tone for call end.
Caution
If the
function is enabled, the length of
Generate busy tone
the outgoing calls billed by the GSM/UMTS operator increases
Error GSM/UMTS causes
Here you can set the ISDN release cause for the states mentioned below. The call
that meets the below mentioned requirements will be rejected with a
user–defined cause (the ISDN cause number will be transformed into a SIP code
for VoIP according to the table shown below).
Lack of digits in OVERLAP mode – the call will be rejected that fails to meet
the minimum digits requirement.
Restricted number prefix – the call will be rejected whose prefix has not
been found in any of the prefix lists.
Selected module / GSM group is not ready – the call will be rejected in case
no GSM module is available in the LCR–selected GSM outgoing group.
Selected module / GSM groups are not ready – the call will be rejected in
case no GSM module is available in the LCR–selected GSM outgoing groups.
Cause translation
Here you can convert the release cause received from GSM/UMTS into another ISDN
release cause. The resultant ISN cause number will be transformed into a VoIP SIP
code as included in the table below:
Conversion table: