[Asterisk-Users] Conversation interrupted by fax

[Julian Lyndon-Smith]

Asterisk SVN-trunk-r7353M (will be moving to 1.2.2 this weekend)
E1 connected to Sangoma A102
SIP phones (Cisco 7960)

I've been making a call from my mobile to the office, when, suddenly the 
conversation is terminated and replaced by a "fax-type" sound. This has 
happened to me several times over the past year, so it's not the version 
of asterisk (we've had cvs trunk and digium TE405 cards running when 
this has happened as well). I've never been able to figure it out.

Today, I was speaking to my wife (I made the call outbound from the 
office to home) and the call went dead. I tried to redial, but kept 
getting the engaged tone. I fired up the * cli, and noticed that there 
was a fax (RXFAX) running on the zap channel that I had previously 
dialled out on. This RXFAX kept running for nearly two minutes, and I 
was unable to call home. However, the second that the rxfax disappeared, 
I was able to call home.

My wife said "it wasn't me, and there was a horrible fax sound on the 
line and I couldn't make any calls".

Now, what is really interesting is the micro second before the call 
dropped, I heard my youngest child start to screech - dinner was being 
served, he was hungry ;)

What I am surmising is that the fax detection is still running on a 
connected call, and decided that the child's screech was a fax machine 
and jumped into receiving a fax .

Is this possible ? I do have fax detection on (zapata.conf). Is there 
anyway of turning fax detection off if the call has been connected ?

Julian.