-implementors] call progress response 180 or 183
We ran into the issue a few times. We sent out "invite" message to a PSTN
number. However, we didn't receive 180 or 183, but 200 ok. We know the media
gateway would like to start the media immediately for transmitting call
progress tone
We ran into the issue a few times. We sent out "invite" message to a PSTN
number. However, we didn't receive 180 or 183, but 200 ok. We know the media
gateway would like to start the media immediately for transmitting call
progress tone. Is it a valid call sequence?
Thanks,
Jing