asterisk users - Apr 2008 - ATA FXO / FXS - can forward to sip ?

Hi All,

Quick question.

We have a customer with a T1 located in their data center, and then one TDM
card for local calls at their remote offices.

We would like to remove the local PBX and TDM card and have them register
directly to the main server.

For the remote office, that still uses one local telephone number over
analogue, we were thinking of getting an ATA device with two FXS and one
FXO.

The FXO would connect directly to Bell, and the FXS would go to an internal
fax machine (outgoing only), and one internal analogue phone.

Now, our question is.

Since the IVR resides on the server in the datacenter, does anyone know of
any ATA devices that will let us forward all calls, over sip (or iax) to the
pbx to hit the IVR?

We basically only need the local office number for emergencies, and when
callers hit it, they should usually get the IVR, unless power is out, in
which case the regular analogue phone would work.

Anyone have any ideas?

Thanks,
Matt
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i can only think of an asterisk box & the right dialplan.
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