I’ve never seen this issue before, but wanted to see if anyone in the community knew more about this.
I have a customer that complained that three calls to the same number were all dropped after a couple minutes (sales call, so naturally they were more upset than normal). On the third call, he prefixed the number with an 8 which routes over a separate provide with the same issue. He eventually finished the sales call on his cell phone and didn’t have any issues.
In looking at the logs, all three calls ended with the following:
[May 24 09:57:02] VERBOSE[17723] chan_sip.c: == Redirecting ‘SIP/Arrival-0000040b’ to fax extension due to CNG detection
[May 24 10:23:55] VERBOSE[18040] chan_sip.c: == Redirecting ‘SIP/Arrival-00000415’ to fax extension due to CNG detection
[May 24 10:28:18] VERBOSE[18807] chan_sip.c: == Redirecting ‘SIP/Veracity-00000422’ to fax extension due to CNG detection
I found some reference to faxdetect=yes controlling this, but when I grep faxdetect in the /etc/asterisk folder, I see that all extensions show ‘faxdetect=no’ and sip_general_additional.conf has ‘faxdetect=yes’.
The customer doesn’t do any faxing through Asterisk, so I would prefer to just disable it all together.
Does anyone know where you can change the setting for ‘faxdetect=yes’ in /etc/asterisk/sip_general_additional.conf as it clears it upon reload if you manually change it?
Thanks,
Brandon