[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:                dbailey
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Project:                    DAHDI-linux
Issue ID:                   14104
Category:                   wctdm
Reproducibility:            always
Severity:                   feature
Priority:                   normal
Status:                     assigned
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Date Submitted:             2008-12-18 02:36 CST
Last Modified:              2009-01-13 17:29 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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 (0097681) dbailey (administrator) - 2009-01-13 17:29
 http://bugs.digium.com/view.php?id=14104#c97681 
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Since you are now setting the the lasttxhook to 4 to generate the HVAC neon
generator, will this not get mixed up as a ringing indicator.  

This obviously cannot coexist with FSK MWI as OHT mode is not available
while generating the HVAC pulses using the ring mode.  Do we see any way of
interlocking this or what the side effects are when doing this?   

How does the HVAC get restarted after standard ringing? I don't believe
that chan_dahdi will initiate anything after the ringing event. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-01-13 17:29 dbailey        Note Added: 0097681                          
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