[Kamailio-Users] Scaling up asterisk using kamailio while keeping features (WAS: re-invite mid call?)

Antonio Goméz Soto antonio.gomez.soto at gmail.com
Mon Jan 4 13:43:49 CET 2010

Op 02-01-10 19:03, Raúl Alexis Betancor Santana schreef:
> On Saturday 02 January 2010 15:31:33 Antonio Goméz Soto wrote:
> Hi Antonio, I think that you are "blocked" with the limited vision that
> Asterisk gives you about VoIP world ... let me explain that ...
>> We actually use:
>> - flash operator panel to transfer calls
> That could be done with xmlrpc calls if you use SEMS+Kamailio

Uhmm, is that event-driven? Because I am convinced you cannot
write a good operator panel on polling line statuses alone.

 > [ snip ]

>> Also recording of G729 calls rules out SEMS and basically all other
>> opensource solutions except asterisk.
> You could use G729 with sems, we use it, you only need to write down some
> lines of C++ code to use the Intel G.729 ipp libraries, for example ... or

Is this legal, I mean, will the G.729 patent holders object to this?

> you could develop a wrapper an use Asterisk .so files of G729 codecs, or a
> hardware card, it's a matter of time, knowleadge and bugget

true, anything can be done if you have unlimit budget.

>> And I currently have no clue on how to do attended transfer, or call pickup
>> on such a system, both of which seem pretty basic to me in a corporate
>> environment.
> Eint ¿? ... an attended transfer it's no more than two calls A call B, B puts
> A on hold, B calls C, C accept the transfer, B transfer A to C ... it just
> work with the basic example .cfg of kamailio, because it's a work of the UA's
> involved on that calls, not a task of the proxy.
> Call-pickup could also be done at proxy level, if your UA's support that
> supplementary services, if not .. a B2BUA must be used.

What is it exactly that a UA must support? Do regular VoIP phones support it?


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