[asterisk-users] Semi OT - Point to Point FXO/FXS GatewayCommunication

[Yuan LIU]

>From: "C F" <shmaltz at gmail.com>
>
>Cory, it's called dialplan magic it realy depends what PBX it is, not
>all of them allow dial plan magic. But it is possible on most pbxes.

CF: What exactly is "diaplan magic"?  I googled but found little info.

The basic use case in Cory's posting does not seem to require special 
programming in PBX, if my understanding is correct:

<phones 1,2,3 > --- (FXS' 1,2,3)<PBX>(FXS' 4,5,6) --- (A-FXO's 
4,5,6)<Asterisk A>
                                     |---- { IP } ----|
                   <Asterisk B>(B-FXS' 4,5,6) --- <phones 4,5,6>

In this case, Asterisks A and B only need to agree on sending the same 
signals received by A-FXO 4 (which always come from PBX-FXS 4) to B-FXS 4 
(onto phone 4), and sending the same numbers received by B-FXS 4 (from phone 
4) to PBX-FXO4 (via A-FXO 4) and so on.  PBX would have no knowledge that 
it's not talking to a POTS phone.  Is this correct?

Yuan Liu

>On 1/24/07, Cory Andrews <cory at voipsupply.com> wrote:
>>Has anyone had any experience using FXO and FXS gateways to extend
>>legacy PBX extensions to remote users?  I have a customer who needs to
>>do this, but wants seamless, two way communication, with a SIP server
>>and without the need for 2-stage dialing.  If anyone has any experience
>>with a solution please let me know.
>>
>>Thanks
>>
>>Cory Andrews