I use a language translation program. Please excuse my poor English.
■ Our purpose
I would like to detect the Ringing state of UA-Bob over the SIP protocol and perform processing during the Ringing state.
■ Approximate timing for phone.callee_ringing
In the image, SIP proxy B serves the Zoom Phone server.
It is expected that phone.callee_ringing will be notified by Webhook from immediately after receiving ②INVITE to immediately after receiving ⑥180Ringing.
■ Checking the actual incoming call timing
⑨ Notification OK after 200.
Is there another way?
Also, are there any plans to fix this behavior?