Hi!
I’m using latest Asterisk 1.6.2.11 - i need to make faxdetection on outbound sip calls.
Is that possible ?
On incoming calls faxdetect works well.
Just to enable faxdetection on sip channel edit sip.conf:
; FAX detection will cause the SIP channel to jump to the 'fax' extension (if it exists)
; based one or more events being detected. The events that can be detected are an incoming
; CNG tone or an incoming T.38 re-INVITE request.
;
faxdetect = yes ; Default 'no', 'yes' enables both CNG and T.38 detection
; faxdetect = cng ; Enables only CNG detection
; faxdetect = t38 ; Enables only T.38 detection
; faxdetect = both ; Enables both CNG and T.38 detection (same as 'yes')
But faxdetection on outgoing sip calls not working 
I tried to use for that purpose NVFaxdetect and NVBackgroundDetect - they are too working only on incoming sip calls.
By the way voip-info.org talks about this voip-info.org/wiki/view/outgoing+fax+detect
On chan_dahdi faxdetection works in both ways - but i need that function on chan_sip.
On incoming fax calls Asterisk detects CNG tone 1100 Hz - to detect fax on outbound call it must listen CED tone 2100 Hz.
I think that to enable this feature need to edit source code of asterisk - who can help me ?
Or there is another ways ?
Please help !
Thanks in advance.