Asterisk to old PBX.

[jsaad]

Asterisk concept that I would like to implement to VoIP enable an older PBX. Maybe someone could tell me if this is do-able or not:

I want to take an analog port off of a PBX and feed into an asterisk system as a trunk. Then I want to register a SIP phone to the asterisk at a remote location. I want that SIP phone to always get dial tone from that "trunk" and dial any extension on the PBX or dial 9 and get dialtone via the PBX. finally whenever that "trunk" rings i want the SIP phone to ring.

can this be done? I was hoping to use Astilinux on an embedded system (Soekris)

 

[engjohn]

Yes, that can be done.
You can also look at askozia for an embedded system.

 

[busster]

Yes, it can be done. You can buy 4 ports fxo and 4 port fxs cards pretty reasonably. They use 4 trunk ports from your pbx to connect to the fxs ports in asterisk and 4 analog station ports to connect to the fxo ports. At that time you have 4 ports going both ways between Asterisk and your legacy pbx. If you have a T-1 card in your pbx, you could also use this to connect the two together, just use a t-1 cross over cable. Traditional esf/b8zs and go, or PRI if you pbx supports.