[Asterisk-bugs] [Asterisk 0009660]: 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:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   9660
Category:                   Core/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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:              07-06-2007 09:56 CDT
====================================================================== 
Summary:                    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.


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

---------------------------------------------------------------------- 
 arcivanov - 07-06-07 09:56  
---------------------------------------------------------------------- 
I can attest to having the same thing. The workaround is to hang up, wait
to 1 - 1.5 sec or more and then pickup. Basically it might be related to
flash functionality (i think you need to pickup within .4 s from the hangup
for flash to  occur as opposed to hangup). 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
07-06-07 09:56  arcivanov      Note Added: 0066591                          
======================================================================