SIP | Early Media | Microphone and camera


I have a question hope you can help.
I understand in SIP, early media is possible for Video. so you can display the camera of the caller before accepting the call. Can the Mic be active for early media too?


The most likely source of early media is audio, although normally recorded announcements or call progress tones, rather than a microphone.

I assume you have complete ownership of the system, end to end, as I would not expect any chargeable service to permit early media.

It looks to me as though app_dial.c only supports early media for Voice (“microphone”), Image (still pictures), and HTML, not for Video (“camera”).

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