[asterisk-users] PRI TBCT - Practical Experience, Anybody?

[Jay R. Ashworth]

On Fri, Aug 15, 2008 at 02:37:46PM -0400, Matt Florell wrote:
> Most carrier sales people don't know what TBCT is unfortunately, and
> even if a carrier is capable of doing it, it is a possiblity that not
> all of their equipment is capable of doing it. One client of mine
> tried to get TBCT working across all 16 of their PRIs(all on the same
> carrier) and it only worked on 4 of them, supposedly because not all
> of the telco equipment was capable of the feature.

I expect to fight this battle, yes.  :-)

> This actually depends on the kind of PRI service you have. For
> instance with DMS100 circuits you can only do TBCT with calls that
> come in to your circuit, not with outgoing calls.
> 
> As for connecting two incoming calls, since that is not possible in
> Asterisk(to natively bridge two incoming calls together) I can't see
> how you would get that to work even if it is possible in TBCT.

To be more clear, what I'm after is to have *someone else besides me*
place calls out their PRI, and then TBCT those placed calls to my DN.

By the time the calls get to me, they should just be standard phone
calls.

So I expect the call-placing-party to need TBCT, but not me.

> I believe that only DMS100, NI2 and 5ESS PRI signalling protocals are
> capable of TBCT with the current zaptel code-base. Also, the two B
> channels involved in the TBCT have to use the same D channel.

And I'm probably not concerned with whether Asterisk can deal with
TBCT, because Asterisk probably won't be involved at that stage; just
once the call's transferred to me.

But before I inquire of said second party whether they *can* do that, I
wanted to confirm it was possible.

Cheers,
-- jra
-- 
Jay R. Ashworth                   Baylink                      jra at baylink.com
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