[Freeswitch-users] TBCT

[Ron McLeod]

Something to be aware of is that after the transfer, even though the
physical B-channels from the PRI link are not being used, they are still
counted towards your total B-channel capacity (this is the case with my
provider anyway).

For example, if you have 12 B-channels from your provider, after 6 transfers
no B-channels will be available until one of the previously transferred
calls clears.





> -----Original Message-----
> From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-
> users-bounces at lists.freeswitch.org] On Behalf Of Michael Collins
> Sent: Tuesday, April 08, 2008 3:43 PM
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] TBCT
> 
> Your blatant plagiarism answered my question perfectly.  Another way of
> saying this, for those of us who are familiar with Centrex, is that this
> allows one to mimic the old "Centrex-transfer" where you flash and dial
> another number and the call gets transferred (or conference'd)...
> 
> Makes sense and I think this is a valuable feature to have.  I will see
> about lending technical and/or financial support.
> 
> Thanks,
> MC
> 
> > -----Original Message-----
> > From: freeswitch-users-bounces at lists.freeswitch.org
> [mailto:freeswitch-
> > users-bounces at lists.freeswitch.org] On Behalf Of Jon Radel
> > Sent: Tuesday, April 08, 2008 3:25 PM
> > To: freeswitch-users at lists.freeswitch.org
> > Subject: Re: [Freeswitch-users] TBCT
> >
> > Michael Collins wrote:
> > > Can you give me a readers digest version of how TBCT works?  It
> might be
> > > something that our company will use in the future...
> > >
> > > Thanks,
> > > MC
> >
> > Blatantly stealing out of an old explanation found on the net:
> >
> > > > Network Facility Request - Two B Channel Transfer (TBCT)
> (Synchronous
> > Mode)
> > > > TBCT enables an ISDN PRI user to request the switch to connect
> > together
> > two
> > > > independent calls on the user's interface. The two calls can be
> served
> > by
> > > > the same PRI trunk or by different PRI trunks. If the switch
> accepts
> > the
> > > > request, the user is released from the calls and the two calls are
> > connected
> > > > directly. Billing for the two original calls continues in the same
> > manner as
> > > > if the transfer had not occurred. As an option, TBCT also allows
> for
> > > > transfer notification to the transferred users.
> > > >
> > > > TBCT works only when all of the following conditions are met:
> > > >
> > > > The user subscribes to TBCT (this feature is supported for the
> 5ESS
> > and
> > 4ESS
> > > > protocols only).
> > > >
> > > > The two calls are of compatible bearer capabilities.
> > > >
> > > > At least one of the two calls is answered. If the other call is
> > outgoing
> > > > from the user, it may be either answered or alerting; if the other
> > call
> > is
> > > > incoming to the user, it must be answered.
> >
> >
> > In other words, you can transfer calls or otherwise connect 2 off-net
> > stations without having to tie up two B channels and bridge them
> > together yourself.
> >
> > --Jon Radel
> 
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