[asterisk-bugs] [Asterisk 0018474]: [patch] "Caller*ID failed checksum" on Wildcard TDM2400P and TDM410

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18474 
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Reported By:                nivek
Assigned To:                rmudgett
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Project:                    Asterisk
Issue ID:                   18474
Category:                   Channels/chan_dahdi
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     closed
Asterisk Version:           1.8.1 
JIRA:                       SWP-2751 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 fixed
Fixed in Version:           
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Date Submitted:             2010-12-14 16:12 CST
Last Modified:              2011-03-14 11:47 CDT
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Summary:                    [patch] "Caller*ID failed checksum" on Wildcard
TDM2400P and TDM410
Description: 
Receiving message "Caller*ID failed checksum" on every call.  Changing
"cidrw_gain" did nothing.  Other cid-based parameters did nothing.
Tested line using a analog phone with the Caller ID feature and received
caller id.

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 (0132909) svnbot (reporter) - 2011-03-14 11:47
 https://issues.asterisk.org/view.php?id=18474#c132909 
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Repository: asterisk
Revision: 310635

_U  branches/1.6.2/
U   branches/1.6.2/main/callerid.c

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r310635 | rmudgett | 2011-03-14 11:47:55 -0500 (Mon, 14 Mar 2011) | 32
lines

Merged revisions 310633 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r310633 | rmudgett | 2011-03-14 11:38:24 -0500 (Mon, 14 Mar 2011) | 25
lines
  
  "Caller*ID failed checksum" on Wildcard TDM2400P and TDM410
  
  The last character in the caller id message is getting a framing error.
  
  The checksum is the last character in the message.  A framing error in
the
  checksum could be because:
  1) The sender did not send a full stop bit.
  2) The sender cut off the FSK carrier too soon.
  3) The sender opted to send zero of the specified zero to 10 trailing
mark
  bits and round-off errors in the code resulted in the code not being
where
  it thought it was in the demodulated bit stream.
  
  Bit 8 of 'b' is set when parity error.
  Bit 9 of 'b' is set when framing error.
  
  Made ignore the framing and parity error bits if the errored character
is
  the checksum.  We can tolerate a framing/parity error there.  The
checksum
  character validates the message.
  
  (closes issue https://issues.asterisk.org/view.php?id=18474)
  Reported by: nivek
  Patches:
        callerid.c.1.patch uploaded by nivek (license 636) (with
modifications)
  Tested by: nivek
........

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http://svn.digium.com/view/asterisk?view=rev&revision=310635 

Issue History 
Date Modified    Username       Field                    Change               
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2011-03-14 11:47 svnbot         Checkin                                      
2011-03-14 11:47 svnbot         Note Added: 0132909                          
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