I am using Asterisk for IVR in conjunction with SER. My service provider prefers that I send a 183 progress message before sending a 200 OK, in response to their INVITE. I am using the   “progressinband” option in sip.conf along with the Ringing() in extensions.conf for this purpose.

When I set progressinband=no, Asterisk (i.e Ringing() command) sends a 100, followed by 180, followed by 200OK in response to an INVITE.  However, when I set  progressinband=yes, Asterisk sends a 100, followed by 180, followed by 183 (with SDP) followed by 200OK.

I want asterisk to send only the 183 without the 180. i.e 100, followed by 183, followed by 200 OK, in response to an INVITE. How do I do that?

regards,

SCM