[asterisk-users] User hit f to disconnect call.

[Vieri]

--- On Thu, 1/26/12, Kevin P. Fleming <kpfleming at digium.com> wrote:

> From: Kevin P. Fleming <kpfleming at digium.com>
> Subject: Re: [asterisk-users] User hit f to disconnect call.
> To: asterisk-users at lists.digium.com
> Date: Thursday, January 26, 2012, 10:58 AM
> On 01/26/2012 07:22 AM, Vieri wrote:
> > Hi,
> > 
> > I was receiving fax calls just fine until recently. I'm
> now having random disconnections.
> > 
> > Faxes are received over an ISDN BRI line and Asterisk
> 1.4 detects it and sends it to a iaxmodem (exten 10025
> below). All's apparently as expected except for the fact
> that the following message comes up in the Asterisk log:
> > 
> > User hit f to disconnect call.
> > 
> > The iaxmodem log also shows a premature hangup (see
> below).
> > 
> > I did a test fax call but I certainly didn't press any
> key to abort the call. What does that message mean?
> > 
> > Asterisk log (0XXXXXXXXX is destination, YYYYYYYYY is
> sending fax machine):
> > 
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- Executing
> [fax at from-pstn-deviate-custom:12] Dial("mISDN/6-u22326",
> "IAX2/10025/0971847022|20|d") in new stack
> > [Jan 26 13:46:13] DEBUG[619] chan_iax2.c: prepending 8
> to prefs
> > [Jan 26 13:46:13] VERBOSE[15361] logger.c: 
>    -- Call accepted by 127.0.0.1 (format
> alaw)
> > [Jan 26 13:46:13] VERBOSE[15361] logger.c: 
>    -- Format for call is alaw
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- Called 10025/0XXXXXXXXX
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- IAX2/10025-3460 is ringing
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- User hit f to disconnect call.
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- Hungup 'IAX2/10025-3460'
> > [Jan 26 13:46:13] VERBOSE[619]
> logger.c:   == Spawn extension
> (from-pstn-deviate-custom, f, 0) exited non-zero on
> 'mISDN/6-u22326'
> > [Jan 26 13:46:13] VERBOSE[619] logger.c: 
>    -- Executing
> [h at from-pstn-deviate-custom:1] Macro("mISDN/6-u22326",
> "hangupcall") in new stack
> 
> 'f' is the fake DTMF control frame used inside Asterisk to
> indicate that a CNG tone was detected. Do you have
> 'faxdetect' enabled on the mISDN channel driver for that
> BRI?
> 
> Even if you do, though, I don't know why receiving an 'f'
> would disconnect the call, unless you've provided the 'd'
> option to app_dial. Even if you did, app_dial should be
> smart enough to not treat 'f' as a DTMF key, but it's not
> (at least not in Asterisk 1.4, this may have changed in
> later versions).

That could be it.
misdn has fax detection for "incoming".
app_dial IS using the 'd' option.
I will try not to use it.

Thanks,

Vieri