[asterisk-bugs] [Zaptel 0013246]: False ring with TDM410 when external caller hang up last (DEFAULT_RING_DEBOUNCE not working right?)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13246 
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Reported By:                arcanos
Assigned To:                
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Project:                    Zaptel
Issue ID:                   13246
Category:                   wctdm24xxp
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Zaptel Version:             1.4.11 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
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Date Submitted:             2008-08-06 02:21 CDT
Last Modified:              2008-09-02 16:22 CDT
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Summary:                    False ring with TDM410 when external caller hang up
last (DEFAULT_RING_DEBOUNCE not working right?)
Description: 
With TDM400, with some analog lines you could find this problem:

Incoming call. Operator answer call. Conversation. Operator hang up first.
When caller hang up, automatically appears a new incoming call. When
operator answer, nobody was on the line (obviously).

With TDM400 this problem appears not so frequently, and it was easy to
remove changing DEFAULT_RING_DEBOUNCE value in wctdm or wctdm24xxp.
Normally putting this value to double was enough.

But the problem appears with TDM410. This problem seems to appear always
(we've made our four last installations with this card and all have this
problem). And you have to increase DEFAULT_RING_DEBOUNCE too much (x4 or
x8). And sometimes, when you eliminate "phantom calls", zaptel fails to
detect some real calls.

And it's clear something happens, because with one of our intallations we
had a TDM400 without any problem, we've change it to a TDM410 and this
problem appears inmediatelly.
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 (0091992) blitzrage (administrator) - 2008-09-02 16:22
 http://bugs.digium.com/view.php?id=13246#c91992 
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As this is a hardware/driver issue, please contact Digium tech support and
utilize those channels to resolve this issue.

Thanks!
Leif. 

Issue History 
Date Modified    Username       Field                    Change               
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2008-09-02 16:22 blitzrage      Note Added: 0091992                          
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