Hello,
I have a problem with early media on my Polycom SoundPoint IP phones.
I use SW 4.0.8. 1608
We have this call flow in our network:
A: is Polycom SounPoint IP 331/450/650
B: is device in another network
A ------> INVITE SDP ------> B
A <------ 100 Trying <------ B
A <------ 183 Session Progress SDP <------ B
A===> RTP ====> B
A <------ 180 Ringing <------ B
...
...
There is no RTP from B side during early media. What I expect is that the Polycom device will be stuck to 183 session progress even there is no RTP and it this case will not play the ringing tone.
But Polycom probably recognized that there is no RTP from B side and after 180 Ringing start to play ringing tone.
Is this correct? Is there a possibility to change this behavior? And if there will be RTP from B side the Polycom device will ignore 180 Ringing?
thank you very much.
Best regards,
Jakub Zima