Summary:ASTERISK-07590: Call progress monitoring on outbound calls not detecting SIT tones
Reporter:Whit Thiele (sirwhit)Labels:
Date Opened:2006-08-23 15:28:07Date Closed:2011-06-07 14:08:03
Versions:Frequency of
Environment:Attachments:( 0) debug.log
Description:In issue 0002799, a patch is proposed to stop call monitoring on outbound calls originating on a PRI. Only if a PROGRESS message with information element (IE 8) is received, call progress detection is enabled. A significant number of outbound calls which are originated by a manager session do not give this PROGRESS message, even though the call is to a disconnected number containing a SIT tone and voice message. The inband information is not analyzed to determine whether or not a SIT tone has been generated. This makes it impossible to determine if these calls are in fact bad numbers or legitimate no answers. Should call progress be analyzed for all outbound calls to make sure these SIT tones are detected?


Running Asterisk on Fedora Core 3
libpri 1.2.2
zaptel 1.2.5

attached is a sample pri debug log showing a call to a known disconnected number.
Comments:By: Whit Thiele (sirwhit) 2006-09-04 17:34:57

I'm getting a new development box this week and will try to enable call progress detection on all calls and see if this makes a difference. If anyone has other suggestions please post them here, otherwise I'll post what I find out.

By: Paul Cadach (pcadach) 2006-10-04 08:56:03

You have Progress Indicator IE = 8 in ALERTING message, so chan_zap should start analyzis of inband audio for detection of progress tones (except for ringing/alerting tone because we already have ALERTING message).

By: jmls (jmls) 2006-11-02 12:06:39.000-0600

ping. housekeeping.

By: Whit Thiele (sirwhit) 2006-11-14 08:20:17.000-0600

It looks like the telco is not passing IE=8 in all cases. The telco is of course saying that everything looks fine on their end. I need to do more research into this. I'll post any findings as soon as I find them

By: Joshua C. Colp (jcolp) 2006-11-15 17:44:34.000-0600

Can you give this a look and perhaps provide some feedback? Thanks.

By: Serge Vecher (serge-v) 2007-02-22 15:57:25.000-0600

any updates here?

By: Whit Thiele (sirwhit) 2007-05-16 10:46:29

I noticed someone added a similar issue: 0009653
I haven't been able to work on this in the past couple of months. Like I said earlier it seems that the IE=8 message isn't passed in all cases. I still get a significant number of disconnected numbers which continue giving a 'Ringing' message until timeout. Anyone able to recrate this?

By: Frank Waller (explidous) 2007-07-02 14:03:33

We seem to have some of the same problems, however in most occasions I see progress and in-band alert, however the tone-detection still does not seem to be done.
I think it should possible to force it via an option!

By: Joshua C. Colp (jcolp) 2007-12-06 09:27:53.000-0600

Per MattF's note in 9653 it would take some effort to make this work and since nobody has provided a patch this is being suspended.