That would be a CNG frame (AST_FRAME_CNG). While a frame exists to convey CNG to capable channel drivers, CNG itself is not implemented or handled in chan_sip (or most of Asterisk).Theres a lot of intervening points between sip_write and whatever genera..
Using a T.38 termination, you can receive faxes using g729, but not while using alaw. If thats the case, your Asterisk installation will need to detect the Fax Tones so as to make the decision the incoming call is a fax and then switch to the fax extensi..
I am using* asterisk 18.104.22.168* , *I am using Spandsp FAX Driver: 20091228 123351*, i will clearly explain my scenario. I am sendingfax to a anlog fax machine which is connected tomediatrix analog gateway. say the analog fax extension is 18260. I h..
Hi I know that all echo cancelers are supposed to shut down when they hear the CNG or CED fax tone. Is this always a good thing ? I know that T.30 is supposed to be half duplex, so echo should not be there but in my session recordings, I have seen b..
Figured it out… 1) Incoming SIP immediately routed out a Dahdi PRI trunk is answered just before it dials the trunk 2) CNG detected after call is bridged 3) Call redirected to fax extension AFTER the bridge is torn down and the hangup extension..
Is echo cancellation automatically disabled upon recognition of CNG tone? Does faxdetect=incoming sends a call to fax extension when CNG tone is detected? Whats the purpose of faxdetect=ou..