Ok thanks! Now I understand the differences. It think more people would
benefit from this if this can be found somewhere in the documentation.
For my purpose I will stick to using B2BUA because it will not do any
media relaying (no delays or possible bandwith/performance issues). It
makes sense!
I tried modifying the invite_req.hdrs before calling connectCallee().
This works flawlessly (off course it does ;-))
Thanks again!
Tom
-------- Originele bericht --------
Onderwerp: Re: [Sems] B2BUA vs. B2ABUA
Van: Stefan Sayer <[email protected]>
Aan: Tom van der Geer <[email protected]>
CC: sems <[email protected]>
Datum: 12-1-2009 13:15
Hello,
o Tom van der Geer [01/12/09 12:49]:
Hi *,
Could anybody point me to a location where I can find more
information about the differences between B2BUA and B2ABUA which are
represented by AmB2BSession and AmB2ABSession in SEMS? Google has not
helped so far and the documentation in these classes has not been
helpful either...
B2ABUA is just from the class name for "B2BUA with audio relay", thus
the 'A'. AmB2BSession is for b2bua with no media (only signaling): one
dialog on each call leg, but the SDPs are passed from one leg to the
other. AmB2ABSession is two dialogs and sessions, unrelated SDP, and
the audio is connected.
Still, the AmB2BSession is designed such that SEMS can accept the call
first, and later send an invite to the callee, and reinvite the caller
leg (e.g. ann_b2b).
I'm developing an application which is currently using
AmB2BCallerSession and AmB2BCalleeSession inheritance, but in the
method AmB2BCallerSession::connectCallee() I'm missing a parameter to
add extra header(s). I noticed that AmB2ABCallerSession also has a
connectCallee method which does have a headers parameter.
just set/modify invite_req.hdrs before connectCallee (e.g.
removeHeader(invite_req.hdrs, "P-App-Name");)
in B2BSession, the INVITE req on the second leg is constructed from
the first INVITE (invite_req), in B2ABSession, a completely unrelated
request is built, thus the differing parameters to connectCallee. But
you are right that these two should better be combined into one class
which would make switching between the two much easier.
Stefan
But before I switch to using the B2AB functionality I'd like to know
if this fit my needs or that I'm exchanging one problem with (more)
other problems...
Thanks in advance!
Regards,
Tom
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