[asterisk-bugs] [Asterisk 0019232]: Phones Ring Forever When Termination Signal Comes Shortly After Initiating Signal

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=19232 
====================================================================== 
Reported By:                adv99
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   19232
Category:                   PBX/General
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     new
Asterisk Version:           1.4.40 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2011-05-05 00:58 CDT
Last Modified:              2011-05-05 05:30 CDT
====================================================================== 
Summary:                    Phones Ring Forever When Termination Signal Comes
Shortly After Initiating Signal
Description: 
This bug causes phones to ring forever when you get a hang-up call, such as
when someone dials the wrong number, or you receive a call from a mobile
caller with spotty coverage (and whose call is immediately dropped after
completing).

The problem is relatively easy to duplicate:

1. Pick-up one extension.
2.  Dial your own extension, another extension, or (preferably) a ring
group, and press the send button/line button on the phone to initiate the
call.
3.  Wait between 50ms and 250ms (long enough for the call to get through
to Asterisk, but before the call starts ringing on the receiving phones).
4.  Terminate the call by pressing the disconnect button.
5.  Each extension you called (Ring Group or Extension, as the case may
be) will start ringing and continue ringing until each individual phone is
answered.  If you called a ring group, each phone must be individually
answered, as answering one phone does not stop the ringing on the other
phones.

If the problem doesn't occur the first time, try varying the timing
slightly (or better yet, simulate the issue by sending the packets one
after the other from a script).

The Asterisk logs show that everything worked fine, i.e. ringing state
set, idle state set, but the phones (including phones made by Aastra,
Siemens, and Grandstream) don't receive the signal terminating the call and
so they keep ringing and ringing...
====================================================================== 

---------------------------------------------------------------------- 
 (0134472) davidw (reporter) - 2011-05-05 05:30
 https://issues.asterisk.org/view.php?id=19232#c134472 
---------------------------------------------------------------------- 
1.4.x is no longer supported, except for security issues.

This is a duplicate report, although I don't have time to track down the
original.  The basic problem is that SIP UACs are not allowed to cancel a
call until they have had an initial response from the UAS.  Asterisk is
realising that it cannot send the cancel, but failing to maintain the
dialogue open and schedule a deferred cancel/bye.

(I commented on the original, which may help you find it.) 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2011-05-05 05:30 davidw         Note Added: 0134472                          
======================================================================