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

[David Cunningham (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-23160?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Cunningham updated ASTERISK-23160:
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    Status: Waiting for Feedback  (was: Waiting for Feedback)

Hi Rusty,

The redirection happened about 12 minutes into the call. At that time in the audio you hear the conversation get interrupted, and then the caller is connected to the destination again (since the 'fax' extension routed to the same place) with the participants saying "what happened?".

I agree there is no audible fax tone, which is why we can't figure out why Asterisk records "CNF detection".

The call started at 12:35:10, and you'll see in the trace that at 12:47:52 the CNG detection was recorded.

I can ask the customer for another trace but want to be sure in advance that it's going to be useful.
Thanks for your help!

                
> 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, Resources/res_fax_spandsp
>    Affects Versions: 1.8.22.0
>         Environment: CentOS release 5.6 32 bit.
>            Reporter: David Cunningham
>            Assignee: David Cunningham
>            Severity: Minor
>         Attachments: 000065d0_ticket_2312.txt
>
>
> 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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