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Refusal of incoming calls with Fastweb Primaries

In a scenario where you have a Mediatrix gateway connected to a Fastweb Primary, it may happen that the operator cuts down the incoming calls for the VOIspeed switchboard. The call would be interrupted by the operator following an unwelcome response to the SETUP by the gateway. The operator arbitrarily cuts down the call by sending a DISCONNECT with generic motivation (inter-networking / unspecified).

To try to solve the problem, it is necessary to disable the sending of the progress indicator (PI) in the Mediatrix in the call proceeding phase. The parameter is found in the ISDN – Interop – Progress Indicator In Call Proceeding menu and must be set to Disable.