[asterisk-bugs] [Asterisk 0017020]: SIP response 415 "Unsupported Media Type" when using G729

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
====================================================================== 
https://issues.asterisk.org/view.php?id=17020 
====================================================================== 
Reported By:                jonaskellens
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   17020
Category:                   Codecs/General
Reproducibility:            always
Severity:                   block
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           Older 1.4 - please test a newer version 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2010-03-13 10:23 CST
Last Modified:              2010-03-15 11:12 CDT
====================================================================== 
Summary:                    SIP response 415 "Unsupported Media Type" when using
G729
Description: 
Using Asterisk 1.4.25.1

Grandstream IP-phone has codecs G729, alaw, GSM.
Zoiper softphone has codecs alaw, GSM.

sip.conf peer definition grandstream :
disallow : all
allow : G729;alaw;GSM

sip.conf peer definition zoiper :
disallow : all
allow : alaw;GSM

When calling from zoiper softphone to Grandstream, the codec used is alaw.

When calling from Grandstream to Zoiper, the call fails with SIP response
415 "Unsupported Media Type".

Why is it that Asterisk does not negotiates about the alaw-codec between
the Grandstream, Asterisk itself and the Zoiper softphone.

Is it normal behaviour that when one of the 2 SIP endpoints does not have
a G.729 license and Asterisk does not hold the license to translate from
G729 codec to another, the call fails ?
====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-03-15 11:12 lmadsen        Description Updated                          
2010-03-15 11:12 lmadsen        Additional Information Updated                  
 
======================================================================