[asterisk-bugs] [Asterisk 0012567]: Big latency (up to 3 sec) when call waiting enabled

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=12567 
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Reported By:                Shkoder
Assigned To:                mnicholson
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Project:                    Asterisk
Issue ID:                   12567
Category:                   Addons/chan_mobile
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Asterisk Version:           1.4.20 
Regression:                 No 
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 103690 
Request Review:              
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Date Submitted:             2008-05-01 22:49 CDT
Last Modified:              2009-02-13 11:20 CST
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Summary:                    Big latency (up to 3 sec) when call waiting enabled
Description: 
I've installed backported chan_mobile latest trunk into asterisk 1.4 and it
working well except one issue. When I am using any phone having call
waiting indication (Sony Ericsson K750, SE K320i, Nokia 6021, Samsung E530)
voice lag appears for incoming traffic (from B-party to asterisk), no
difference if call is incoming or outgoing.

I have modified chan_mobile.c to disable callwaiting indication and sound
lag disappeared. Does that means problem inside chan_mobile ?
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 (0100112) binsa (reporter) - 2009-02-13 11:20
 http://bugs.digium.com/view.php?id=12567#c100112 
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I'sure that the big latency is because of the callback functions mbl_read
and mbl_write. mbl_read only bufferring the frames and mbl_write do actual
reading. If mbl_write is called more rarely, will be latency. In the
revisions before 431 there is no such problem, also no problems with DTMF. 

Issue History 
Date Modified    Username       Field                    Change               
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2009-02-13 11:20 binsa          Note Added: 0100112                          
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