[Freeswitch-users] DTMF capture and early media
Борисов, Дмитрий / Dmitriy Borisov
bordmi at rarus.ru
Sat Jan 30 23:19:00 MSK 2016
https://tools.ietf.org/html/rfc3960 has next part:
Early media refers to media (e.g., audio and video) that is exchanged
before a particular session is accepted by the called user. Within a
dialog, early media occurs from the moment the initial INVITE is sent
until the User Agent Server (UAS) generates a final response. It may
be unidirectional or bidirectional, and can be generated by the
caller, the callee, or both. Typical examples of early media generated by
the callee are ringing tone and announcements (e.g.,
queuing status). Early media generated by the caller typically
consists of voice commands or dual tone multi-frequency (DTMF) tones
to drive interactive voice response (IVR) systems.
But I know that in FreeSWITCH in preanswer state I can`t capture DTMF. Why?
This part of RFC is conflicting with some other standard? It can be
very intresting feature.
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