[asterisk-bugs] [Zaptel 0009096]: [patch] DTMF CID without polarity reversal implementation in wctdm for Denmark, Brazil, etc

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=9096 
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Reported By:                fleed
Assigned To:                
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Project:                    Zaptel
Issue ID:                   9096
Category:                   wctdm
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     ready for testing
Zaptel Version:              1.2.13 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        Yes 
Request Review:              
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Date Submitted:             02-18-2007 19:02 CST
Last Modified:              08-17-2007 11:51 CDT
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Summary:                    [patch] DTMF CID without polarity reversal
implementation in wctdm for Denmark, Brazil, etc
Description: 
Caller id signaling in Denmark, Brazil and other places is done through
DTMF tones before the first ring, without polarity reversal to indicate the
start of incoming data. Currently wctdm can only detect dtmf callerid if
there is a polarity reversal before the dtmf digits, so it's not working in
some countries.

This uses the idea reported in bug id 9 for wcfxo, but implements it in
wctdm. It fakes a polarity reversal so that the code already in chan_zap
can take that and pass it through the dtmf bit.

To use, patch and build the zaptel part, load the module with option
dtmf=1. Then use the following in zapata.conf:
callerid=asreceived
usecallerid=yes
cidsignalling=dtmf
hidecallerid=no
cidstart=polarity

Works fine in Brazil, on a Telemar line.

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Relationships       ID      Summary
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related to          0000009 [patch] DTMF CLIP not supported by Aste...
related to          0009201 Problem with caller ID detection when D...
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---------------------------------------------------------------------- 
 tbsky - 08-17-07 11:51  
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hi:
   i am trying asterisk 1.4.9, 1.4.10, 1.4.10.1 with zaptel 1.4.4.
the patch works great in most cases. but sometimes the head of caller-id
could be lost. for example, if the real caller-id is "12345678", sometimes
asterisk could  only receive "2345678" or "45678". i think maybe sometimes
the polarity reverse emulation is not fast enough, so the caller-id is sent
before asterisk receiving.
my test machine is dual-core cpu with no users on it, so system
performance should  not be an issue. 
   how can i fix this? thanks a lot for any reply!! 

Issue History 
Date Modified   Username       Field                    Change               
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08-17-07 11:51  tbsky          Note Added: 0068996                          
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