asterisk users - Sep 2004 - Transfer and Release of a call out to PSTN

Hi Again All,

When using Asterisk with a PRI to the CO is it possible to transfer a call
back out and release. In other words, once the call is connected (caller and
external 3rd party) Asterisk is removed from the equation thereby freeing
the PRI channels.

I ask because my scenario is going to require frequent external transfers
and I would like to control the PRI costs.

Could this be done using SS7? If so, does anyone know if any Asterisk SS7
development is being done?

Thanks

Chris

On Thu, 16 Sep 2004 12:41:47 -0400, Christopher Jacob
<chris@jacob-solutions.com> wrote:
> When using Asterisk with a PRI to the CO is it possible to transfer a call
> back out and release. In other words, once the call is connected (caller
and
> external 3rd party) Asterisk is removed from the equation thereby freeing
> the PRI channels.
> 
> I ask because my scenario is going to require frequent external transfers
> and I would like to control the PRI costs.
You're looking for a feature called "Take Back and Transfer", TBT
for
short. It works by the telco always monitoring the trunks for DTMF
from your end, for example, the TBT code might be *8. You would send
*8,12125551212 down the line and the telco will pull the call back and
send it to the number specified, in this example direct service for
Manhattan.

The last time I looked into it it was a specialized service and had a
higher per minute rate than conventional termination.

sl