2N StarGate/BlueTower v5.7 - Manual (Page 82)

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Audio level
Output audio level of GSM codec [ – . dB] audio volume gain/loss to GSM
Input audio level of GSM codec [dB] – audio volume gain/loss from GSM.
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.