[Asterisk-bugs] [Asterisk 0009660]: [patch]Asterisk can't establish dialtone after brief hangup

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=9660 
====================================================================== 
Reported By:                mmacvicar
Assigned To:                bbryant
====================================================================== 
Project:                    Asterisk
Issue ID:                   9660
Category:                   Channels/chan_zap
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.4.4 
SVN Branch (only for SVN checkouts, not tarball releases): N/A  
SVN Revision (number only!):  
Disclaimer on File?:        No 
Request Review:              
====================================================================== 
Date Submitted:             05-03-2007 14:08 CDT
Last Modified:              07-12-2007 20:29 CDT
====================================================================== 
Summary:                    [patch]Asterisk can't establish dialtone after brief
hangup
Description: 
Asterisk can't establish dialtone after brief hangup

When I press the hook-switch (i.e., receiver button) and then let go to
make a new call, the phone doesn't establish dialtone unless I hold it down
for for 4-5 seconds.

Reproducible Steps:
1. Pick up handset and establish dialtone.
2. Press the hook-switch for 1-3 seconds and let go

After letting go of the hookswitch, the sound on the line is silent for a
moment then a computerized squeal is heard briefly and silence continues.
The asterisk console displays the following messages when "core set verbose
10":
--------------------
    -- Starting simple switch on 'Zap/7-1'
    -- Hungup 'Zap/7-1'
[May  3 11:31:45] WARNING[2241]: chan_zap.c:1616 zt_set_hook: zt hook
failed: Device or resource busy
--------------------

We are using analog Astra Telecom 480e phones connected through internal
wiring to TDM400P cards in our asterisk server.


====================================================================== 

---------------------------------------------------------------------- 
 explidous - 07-12-07 20:29  
---------------------------------------------------------------------- 
We tried the patch and it at least seems to work to the point that we do
not see the "zt hook failed" error message anymore. And phones do not seem
to get in an undetermined state that easily anymore. For me this should be
included in the next release. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
07-12-07 20:29  explidous      Note Added: 0067327                          
======================================================================