[asterisk-bugs] [JIRA] (ASTERISK-23160) Fax CNG detection when no apparent CNG present in inbound audio stream

[David Cunningham (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-23160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=215744#comment-215744 ] 

David Cunningham commented on ASTERISK-23160:
---------------------------------------------

Thank you. I'll ask the customer to get a trace with those options if they can.
                
> Fax CNG detection when no apparent CNG present in inbound audio stream
> ----------------------------------------------------------------------
>
>                 Key: ASTERISK-23160
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23160
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Applications/app_fax, Resources/res_fax_spandsp
>    Affects Versions: 1.8.22.0
>         Environment: CentOS release 5.6 32 bit.
>            Reporter: David Cunningham
>            Severity: Minor
>         Attachments: 000065d0_ticket_2312.txt, rtp_ssrc_4D7.raw.tar.gz
>
>
> We have an Asterisk system with "faxdetect = yes" in sip.conf and sometimes a call is suddenly redirected to the 'fax' extension even though there's no fax tone in the audio. Eg:
> [Jan 13 12:47:52] VERBOSE[12712] chan_sip.c:   == Redirecting 'SIP/product-local-000065d0' to fax extension due to CNG detection
> We can provide a PCAP with audio and an Asterisk full log if required. Thanks.

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