Good day.

I have a problem when using android native sip client. When dialplan used Progress (sending 183 Session Progress) after some seconds android native sip client declines a call (the logs are at the end of). No ealry media be heard.

In same call using Ringing (180) is everything ok.

In same call using Progress and other SIP clients (any) is everything ok. Early media exists.

Is it possible to make native SIP client works correctly?
Should I send 180 and 183 at the same time? In what sequence?
Standards and many discussions on the Internet claim that should be sent just one of them.

Thanks. Dmitriy Serov.

[2016-01-31 14:44:56] VERBOSE[1950] res_pjsip_logger.c: <-