[Asterisk-Users] Fax tone detection problem on bridged (PRI -> SIP) calls

[Alex Zarubin]

Greetings,

[w_pstn]
exten => 8478106205,1,record,w_faxmsg:pcm
exten => 8478106206,1,Dial,SIP/w_sip
exten => fax,1,Goto(w_fax,8478106207,1)

[w_fax]
exten => 8478106207,1,Dial,Zap/g1/8478106207

We send faxes (from the same fax machine) to 8478106205 and 8478106206.

On 8478106205 fax tone is always detected and we have a successful fax
transmission to 8478106207.
On 8478106206 call is connected to the SIP application, but the fax tone is
not detected, so we keep beeping (CNG) to the app.

In both cases we see several sequences of 4 messages each (uncommented in
dsp.c) like
	Fax energy/Second Harmonic: 57393933745.000381/22932862397.987717
so fax_hits counter should be the same.

Please, help.

Alex Zarubin
Webley Systems, Inc.


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