[asterisk-bugs] [DAHDI-linux 0014104]: [patch] Generate VMWI line reversal from FXS module to light LED on newer 'non intellegent phone'

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=14104 
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Reported By:                alecdavis
Assigned To:                
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Project:                    DAHDI-linux
Issue ID:                   14104
Category:                   wctdm
Reproducibility:            always
Severity:                   feature
Priority:                   normal
Status:                     new
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Date Submitted:             2008-12-18 02:36 CST
Last Modified:              2008-12-18 03:22 CST
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Summary:                    [patch] Generate VMWI line reversal from FXS module
to light LED on newer 'non intellegent phone'
Description: 
Added initial fundamental support to manipulate FXS line to generate
Message Waiting Indication. Still supports sending FSK as has been
supported for years.

Discovered undocumented parameter 'mwisendtype' in chan_dahdi.conf which
can only be 'rpas' Ring Pulse Alert Signal at the moment.

Intention is to use this field with parameters as follows;
   'fsk' or undefined for exisiting FSK only support.
   'none' no FSK spill heard every second time you go off hook.
   'rpas' for existing support ring pulse before FSK
   'lrev' line reversed while messages exist
   'hvdc' high voltage, 90Vdc idle voltage
   'hvac' high voltage neon generation, Following Silicb AN33

Alec


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 (0096606) alecdavis (reporter) - 2008-12-18 03:22
 http://bugs.digium.com/view.php?id=14104#c96606 
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Googling 'MWI line reversal' brings up many hits, but what is become
apparent with most of the low cost phones is that most that I looked at
support 'MWI line reversal' as well as 90Vdc line voltage.

In summary, this patch may be all that is needed by the majority, only a
minority I believe are going to need the 90Vdc (which should be easy to
do), and a few may require the 90Vac MWI indication.

If you find this patch usefull or otherwise, please report in.

Alec 

Issue History 
Date Modified    Username       Field                    Change               
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2008-12-18 03:22 alecdavis      Note Added: 0096606                          
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