[asterisk-bugs] [JIRA] (ASTERISK-23160) Faulty fax detection

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-23160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=214323#comment-214323 ] 

Matt Jordan commented on ASTERISK-23160:
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Yes, we're going to need the pcap and the log file. That statement is indicating that Asterisk believes it has received a CNG tone.

Most likely, an audio analysis would have to be done to determine if it is the DSP code in Asterisk that is off, or if something is actually transmitting what could be interpreted to be a CNG tone.
                
> Faulty fax detection
> --------------------
>
>                 Key: ASTERISK-23160
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-23160
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Applications/app_fax
>    Affects Versions: 1.8.22.0
>         Environment: CentOS release 5.6 32 bit.
>            Reporter: David Cunningham
>            Severity: Minor
>
> 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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