[asterisk-dev] zt_pvt explained

Matthew Fredrickson creslin at digium.com
Fri May 9 16:10:09 CDT 2008

Panagiotis Kourtidis wrote:
> Hi everyone,
> I was interested in understanding the function of the zt_pvt structure
> when someone is trying to create a 3 way call. Is there any
> documentation of what the structure holds (prev, next, master, owner,
> slaves, subs... etc) and how can one manipulate the structure to
> establish a 3 way call.

Unfortunately, there is not a lot of documentation covering that 
feature.  It is probably one of the most complicated portions of 
chan_zap, although the different legs of the call are on the subs 
(subchannels), if that helps your research any.

Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.

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