68 reputation
17
bio website nelenkov.blogspot.com
location Tokyo, Japan
age
visits member for 2 years, 4 months
seen Apr 28 at 7:38

May
1
comment How to configure Asterisk to send audio before call is established
Accepting this as this the more detailed answer. Will post more questions once I get a chance to try out a few things.
Apr
29
comment How to configure Asterisk to send audio before call is established
Thanks for your answer. That is pretty much what I've pieced together from mailing list posts and bug reports I found online. What I am trying to do is send early voice while receiving early media from the remote party before they answer. So they are the ones that answer and I can't control that. I will experiment with the 'd|D' options, thanks for the hint. As for the actual SIP phone, it can send early voice, I can record voice using Asterisk without sending an OK. Most examples deal with early media when the target is Asterisk, as does the wiki you linked.
Apr
24
comment How to configure Asterisk to send audio before call is established
Thanks for you answer. Are sure about this? I've seen a few posts that say that it is possible to both receive audio and send inband DTMF tones to a remote IVR by using early media when connected through Asterisk. I have no easy way to test it currently though.
Apr
23
comment How to configure Asterisk to send audio before call is established
This seems to work when the target is Asterisk with something like NoOP(test) Progress() SayAlpha(asdf) Wait(20) ... This give audio in both directions without establishing the call. Still not sure what is needed to get it working when calling an actual remote party.
Apr
20
comment How to configure Asterisk to send audio before call is established
At least RFC3960 defines this: 'Early media refers to media (e.g., audio and video) that is exchanged before a particular session is accepted by the called user. (...) It may be unidirectional or bidirectional, and can be generated by the caller, the callee, or both.'
Apr
20
comment How to configure Asterisk to send audio before call is established
Thanks. I'm not quite sure either, but they have their own spec :) And it seems to require it. (To emulate the PSTN?)