[Asterisk-Users] Problem with fax tone (CNG) and fax detection

[Michael Welter]

Nicolás Gudiño wrote:
> Hello,
> 
>  
> 
>>The problem with the call files is that the busy tone is not being
>>detected, and the reason the busy tone is not detected is because the
>>fax tone (CNG) is being injected onto the line by the TxFax application.
>>
>>When I remove "|caller" from the call files (no CNG tones), all fax
>>calls are properly sent (busy is detected by * and the call retried).
>>However, by removing "|caller| and not sending the CNG tones, some fax
>>receivers will not be able to properly handle the call.
>>
>>Is there some way for * to detect busy tones while ignoring (filtering)
>>the CNG tones?
> 
> 
> Maybe by setting the following in zapata.conf
> 
> ;faxdetect=both
> ;faxdetect=incoming
> ;faxdetect=outgoing
> ;faxdetect=no
> 

No, that doesn't work.  When I say "faxdetect=both", the fax tones 
emitted by TxFax are heard by * and sent to the fax extension--not a 
good thing.

I have faxes both inbound and outbound on these lines, so I'll have to 
leave it at "faxdetect=incoming".

Thanks,
Mike

-- 
Michael Welter
Introspect Telephony Corp.
Denver, Colorado US
+1.303.674.2575
mike at introspect.com
www.introspect.com