[asterisk-bugs] [Asterisk 0013023]: G722 negociation problem with Aastra 5xi phones

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=13023 
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Reported By:                olivier1010
Assigned To:                
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Project:                    Asterisk
Issue ID:                   13023
Category:                   Applications/app_osplookup
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.6.0-beta9 
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:             07-08-2008 09:08 CDT
Last Modified:              07-08-2008 18:52 CDT
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Summary:                    G722 negociation problem with Aastra 5xi phones
Description: 

Using Aastra firmware 2.2.1 on serie 5xi, the G722 mode does not work
correctly.

Asterisk negociate only at G722/8 Khz, giving a sound quality not better
and less natural than G711.

strangely, when calling voicemail, (using G722/16 songs), G722 is really
in 16 khz mode.

G722 is first priority in the aastra setup. Here we can't choose wich mode
/8 or /16 is first priority. G722/8 is certainly the first choice in the
phone.


I think that to allow for G722/16, asterisk should force using it instead
of relying on the phone codec priority.


Last, any possibility to have G711u/16 G711a/16 codecs for asterisk 1.6 ?
(supported by aastra).

G722 is not as good as G711. The song is sligtly compressed and unnatural,
not as compressed as G729.1, but we can hear the difference.

G711/16 is 128 kbits/sec but it is not a problem for LAN calls.

Thanks for your listening.


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 putnopvut - 07-08-08 18:52  
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Hmm, correct me if I'm wrong, but there is no such thing as 8 khz g.722. I
know that SDP's which specify g.722 show G722/8000 due to an error made in
RFC 1890. The codec still operates at 16 khz though. 

Issue History 
Date Modified   Username       Field                    Change               
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07-08-08 18:52  putnopvut      Note Added: 0089921                          
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