[asterisk-bugs] [LibPRI 0012794]: Unknown IE 26 (Unknown Information Element)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=12794 
====================================================================== 
Reported By:                hellc2
Assigned To:                
====================================================================== 
Project:                    LibPRI
Issue ID:                   12794
Category:                   General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           1.4.20.1 
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             2008-06-05 05:11 CDT
Last Modified:              2009-03-16 15:29 CDT
====================================================================== 
Summary:                    Unknown IE 26 (Unknown Information Element)
Description: 
In Spain I receive this message sometimes in each call.
It's supposed is any kind of AOC message as I could see in others bugs
reported here but I just install currently stable Libpri version and
continues happening.

[Jun  5 12:09:42] ERROR[6542] chan_zap.c: !! < Unknown IE 26 (cs5, len =
4)
[Jun  5 12:09:45] ERROR[6542] chan_zap.c: !! < Unknown IE 26 (cs5, len =
4)
[Jun  5 12:10:10] ERROR[6542] chan_zap.c: !! < Unknown IE 26 (cs5, len =
4)
[Jun  5 12:10:36] ERROR[6542] chan_zap.c: !! < Unknown IE 26 (cs5, len =
4)
[Jun  5 12:10:40] ERROR[6542] chan_zap.c: !! < Unknown IE 26 (cs5, len =
4)
...
======================================================================
Relationships       ID      Summary
----------------------------------------------------------------------
related to          0007494 [patch][post 1.4] Decoding / Encoding /...
====================================================================== 

---------------------------------------------------------------------- 
 (0101817) tilghman (administrator) - 2009-03-16 15:29
 http://bugs.digium.com/view.php?id=12794#c101817 
---------------------------------------------------------------------- 
It appears that IE 26 is interpreted in Belgium as "Charging advice" and is
a network-specific extension of the Q.931 standard.  See
http://www.acacia-net.com/wwwcla/protocol/q931.htm

Given that we do not currently support AoC in Asterisk (see issue
http://bugs.digium.com/view.php?id=7494),
this is a moot point, and the IE can be safely ignored at this time. 
However, even when AoC is supported, the issue is that we do not have the
necessary specifications to accurately decode this IE extension. 
Therefore, it's unlikely we would support it, even when AoC is added. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-03-16 15:29 tilghman       Note Added: 0101817                          
======================================================================