sendonly to sendrecv in 183 session-progress
Good day.
Please advise on the following scenario.
Call is received from session-agent x.x.x.x on realm-id vendor_realm.
Call is sent to access-realm, and sent to a specific user, which sends 183 Early media with media attribute set to sendonly, no alerting is heard, until user answers.
SIP/2.0 183 Early media
Via: SIP/2.0/UDP y.y.y.y:5060;branch=z9hG4bKvtfcfa108ornff34ff00.1
Record-Route: <sip:y.y.y.y;lr;ep>
Contact: sip:y.y.y.y:5077
To: <sip:27120012739@y.y.y.y:5060;user=phone>;tag=HVWZQDIF4FHS5G36J7UQ____.i
From: <sip:27118091500@x.x.x.x;user=phone>;tag=SDmumc402-5E5E619A-290BFD9-0ADE1011