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

[Michael Collins]

> You should expect that; in fact, that's what the 'TB' in 'TBCT' stands
> for... for a time, there are two B-channels involved. TBCT is a method
> of taking two existing already connected B-channels and linking them
> together into the network, it is not a 'transfer' facility where you
> provide a target DN and an existing call is 'transferred' to that
> destination. That feature is ELT (Explicit Line Transfer) and may also
> be known by other names, or possibly Call Deflection (CD) depending on
> whether you do it before the call is answered or after.
> 
> In the scenario you outlined, the original caller (party A) calls this
> mediator (who answers as party B1). They then place a call (party B2)
to
> you (party C), which you answer. Once that call is established, they
can
> TBCT party A and party C, thus dropping the party B1/B2 legs. You will
> never see party A's identifying information on the call to you unless
> party B decides to provide it to you in some fashion; the network
> signaling would never know to provide it to you, since this is not a
> call transfer in the RDNIS sense of 'call transfer'.
> 
> --
> Kevin P. Fleming

Kevin,

This answer is excellent! Very well-worded and definitely useful to help
someone grasp the idea behind TBCT.

-MC