[asterisk-bugs] [Asterisk 0005014]: [patch] implement call pickup on Snom phones

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
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http://bugs.digium.com/view.php?id=5014 
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Reported By:                xylome
Assigned To:                oej
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Project:                    Asterisk
Issue ID:                   5014
Category:                   Channels/chan_sip
Reproducibility:            N/A
Severity:                   feature
Priority:                   normal
Status:                     assigned
Asterisk Version:            SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!): 60212 
Disclaimer on File?:        Yes 
Request Review:              
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Date Submitted:             08-24-2005 05:37 CDT
Last Modified:              01-10-2008 12:39 CST
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Summary:                    [patch] implement call pickup on Snom phones
Description: 
this is more or less my current SIP playground, that i want to share with
others.
maybe some of these ideas could be the starting point for properly
implemented features within asterisk. please feel free to use this for
inspiration.
some of the features are highly experimental. so be warned!
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Relationships       ID      Summary
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related to          0004838 [patch] [post 1.2] present SIP Call-ID ...
related to          0007162 No reply to PUBLISH requests
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 tkrah - 01-10-08 12:39  
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I've got a Snom360 which subscribed to some other phones:
Lets take three extensions, 10, 11 and 15.

10 did a redirection on the phone to 15.
If someone calls 10 it gets correctly transfered to 15.
11 is subscribed to 10 and 15.

If 10 is ringing, 11 gets early state sip message.
10 redirects with 302 to 15.
Now 11 gets early state notify message about 15.
And 11 gets a terminate message about 10 (which is good, but * still does
sent early state messages later).
Now if the call is canceled, a terminated notify message is sent to 11
that 15 is now in idle state.

But * does still sent early state messages to 11 telling that 10 is in
early state (after the terminated message above), although no one is
calling 10 (it was redirected to 15).
I would expect, if 302 is sent from a subscribed extension and this is
successfull, a terminated notify is sent to 11 about 10 and thats it.

The subscribed party now sees in a "neverending" loop that 10 is ringing
althoug "its not".
It gets only cleared at the time the subscriptions are refreshed, either
through timeout or reboot of the phone.
Without pkempgens patch this does not happen.

Trace is siptrace-notify.txt. 

Issue History 
Date Modified   Username       Field                    Change               
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01-10-08 12:39  tkrah          Note Added: 0076676                          
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