[asterisk-bugs] [DAHDI-linux 0017318]: FXS Polarity Reversal on Hangup

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17318 
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Reported By:                armeniki
Assigned To:                
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Project:                    DAHDI-linux
Issue ID:                   17318
Category:                   NewFeature
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
JIRA:                        
Reviewboard Link:            
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Date Submitted:             2010-05-11 06:12 CDT
Last Modified:              2010-06-17 02:44 CDT
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Summary:                    FXS Polarity Reversal on Hangup
Description: 
FXS lines normally connect to a telephone.  However, when FXS lines are
routed to an external PBX or Key System to act as "external" or "CO" lines,
it is extremely difficult, if not impossible for the external PBX to know
when the call has been disconnected without receiving a polarity reversal
on the line.

DAHDI/Asterisk should have a feature to allow a setting someplace, perhaps
in chan_dahdi.conf, to allow a FXS channel to provide a polarity reversal
on channel hangup.
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 (0123521) alecdavis (manager) - 2010-06-17 02:44
 https://issues.asterisk.org/view.php?id=17318#c123521 
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armeniki: I believe your note
https://issues.asterisk.org/view.php?id=17318#c123513 is specifically related to
the FXO
port, and already supported.

If you have ROD support on your lines from your telco, in chan_dahdi.conf
you need hanguponpolarityswitch=yes for the ports connected to the incoming
lines.

Or in chan_dahdi.conf busycount=4 for the FXO ports. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-06-17 02:44 alecdavis      Note Added: 0123521                          
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