[asterisk-bugs] [Asterisk 0019267]: Hold music lost after attended transfer

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=19267 
====================================================================== 
Reported By:                byronclark
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   19267
Category:                   Channels/chan_sip/Transfers
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.8.4 
JIRA:                       SWP-3455 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2011-05-10 15:40 CDT
Last Modified:              2011-05-12 13:52 CDT
====================================================================== 
Summary:                    Hold music lost after attended transfer
Description: 
Testing with three endpoints I see this behavior:
A calls B
B begins an attended transfer
  - A hears hold music
B dials C
C answers
C places the call on hold
  - B hears hold music
B completes the attended transfer
  - A hears silence

As soon as C resumes the call, audio flows in both directions. C can even
place the call on hold again and A will hear hold music.

If B completes the attended transfer before C places the call on hold,
then audio works at all times.

Please let me know what debug information would be useful to track this
down.
====================================================================== 

---------------------------------------------------------------------- 
 (0134847) byronclark (reporter) - 2011-05-12 13:52
 https://issues.asterisk.org/view.php?id=19267#c134847 
---------------------------------------------------------------------- 
The two attached traces (mildly sanitized) show the call flow described. 

issue_0019267_siptrace_working.txt is a capture from 1.6.2.17.3 where the
hold music does appear correctly.

issue_0019267_siptrace_broken.txt is a capture from 1.8.4 where the hold
music does not appear correctly.

In both files the following actors are present:
A:
- Caller Name: "Lost"
- SIP Username: 012fe548c973465d0c006300620001
- Dialable Extension: 5000

B:
- Caller Name: "Byron Clark"
- SIP Username: 0128d5efc9c276be27ba006300620001
- Dialable Extension: 1234

C:
- Caller Name: "Desk Test"
- SIP Username: 0127e3256489f81c6533006300620001
- Dialable Extension: 1001 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-05-12 13:52 byronclark     Note Added: 0134847                          
======================================================================