With Asterisk
An ISDN call is started, at the T1 level we receive “call proceeding” and immediately we receive a “Call in Progress” just like the far end party has answered.
With SER
An ISDN call is started, at the T1 level we receive “call proceeding” which is OK, and when the call fails we get the cause code of why the call failed
Any suggestions as to how Asterisk can wait for the PSTN to receive a call in progress?
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