[asterisk-users] Anyone actively using RLT for mobile phone forwarding?

[Matt Florell]

On 8/4/09, Brian Thompson <brian at eng.wayne.edu> wrote:
>
>  Hello,
>
>  We currently have a scenario where a large percentage of inbound
>  calls on a telco PRI are intended for professors who aren't currently
>  in their offices/at their desks.
>
>  My question is, is anyone actively using the Asterisk "RLT" (Release
>  Link Trunking) feature to bounce these sorts of calls back to the
>  telco? The idea being to forward the call to their mobile phone without
>  tying up two of the PRI channels (one inbound and one outbound)
>  for the duration of the call.
>
>  If so, any caveats pertaining to the combination of RLT and Asterisk
>  that I should be aware of before attempting to build such a system?
>
>  Thanks,
>  Brian

Hello,

We have set up several systems using TBCT(Two B-Channel Transfer),
which is the NI2 protocol version of RLT(which is for DMS100 only). As
long as the carrier supports it(which is always the biggest problem in
our experience), the actual functionality works great with Asterisk.
Some things to keep in mind:

- Your carrier will bill you for the time on the off-circuit legs of
the call, and will send you a PRI message when the call hangs up.
Asterisk throws up a warning for this event and ignores it(not logged
in any way).
- With RLT(on DMS100) you can only do RLT with calls that come in to
your circuit, whereas TBCT on NI2 can work for inbound or outbound
initiated calls.

Setup is fairly easy for these, just set zapata.conf
facilityenable=yes and transfer=yes and upon a native bridge on the
same trunk group the calls will be released to the carrier and free up
those two lines.


MATT---