[asterisk-bugs] [Asterisk 0017021]: On omitting the T flag from Dial() the caller can still make a blind transfer

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=17021 
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Reported By:                kovzol
Assigned To:                lmadsen
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Project:                    Asterisk
Issue ID:                   17021
Category:                   Channels/chan_sip/Transfers
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                       SWP-1090 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2010-03-13 11:18 CST
Last Modified:              2010-03-19 00:14 CDT
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Summary:                    On omitting the T flag from Dial() the caller can
still make a blind transfer
Description: 
I use allowtransfer=yes in sip.conf. I think if I omit the T flag from
Dial() in a dialplan extension, no blind transfer should be made by the
caller. But the caller can still make a blind transfer if he presses the
TRANSFER key.

A partial workaround is if I set allowtransfer=no in sip.conf, but this
will disable the blind transfer initiated by the caller side as well (which
is not what I would like to).
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 (0119597) ebroad (manager) - 2010-03-19 00:14
 https://issues.asterisk.org/view.php?id=17021#c119597 
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I did a simple test by calling my fax line from an outside line(cell
phone), with only t(not T) being passed to Dial() when routing from my
trunk to the inside extension and I was unable to transfer via the key
combination in features.conf. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-03-19 00:14 ebroad         Note Added: 0119597                          
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