[asterisk-bugs] [Asterisk 0015048]: [patch] NT over PtMP for BRI

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=15048 
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Reported By:                vrban
Assigned To:                
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Project:                    Asterisk
Issue ID:                   15048
Category:                   Channels/chan_dahdi/NewFeature
Reproducibility:            N/A
Severity:                   feature
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2009-05-07 07:34 CDT
Last Modified:              2009-05-21 20:09 CDT
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Summary:                    [patch] NT over PtMP for BRI
Description: 
Ok, this patch is a naive test i made, but very very limited a bit is
allready working. You can call from one connected ISDN device (i used a
ISDN/analog adapter DeTeWe TA33) into chan_dadhi. That's all, nothing more.
You can't call from chan_dadi to the ISDN device or connect multiple isdn
devices.

Also chan_dadi jumps directly to the s-Extension when you lift up the
phone. And dont give you dial tone or wait for digits. But i was pleasantly
surprised that NT-ptmp is working anyway.

Let's start to work on this, to finally ditch bristuff and chan_misdn
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 (0105272) vrban (reporter) - 2009-05-21 20:09
 https://issues.asterisk.org/view.php?id=15048#c105272 
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i attached libpri_nt_ptmp_v3.patch and chan_dahdi_nt_ptmp_v5.patch, a
_highly_ experimental hack to add NT-PTMP mode into libpri.

You can call from chan_dahdi to one isdn device, it get a TEI and
it ring, but if you lift up the isdn device, chan_dahdi dont transport
audio:

DEBUG[22402]: chan_dahdi.c:7068 dahdi_write: Dropping frame since I'm
still dialing on DAHDI/1-1...

But audio basically is arriving from the isdn device. When i set a
MixMonitor before Dial, i can hear my voice from the isdn device in the
recorded file.

The main work it need, is the pri->subchannel, we need a subchannel for
every TEI, and if a call from a specific TEI is incoming, we need to use
the subchannel for this TEI. I the now in the hack i just use only one
subchannel for every TEI, this work only if only one device is attached.

And second, we need to spot, why chan_dahdi dont transport the audio(the
p->dialing is still) activ after libpri get CONNECT and send the CONNECT
ACKNOWLEDGE. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-05-21 20:09 vrban          Note Added: 0105272                          
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