Miscellaneous Operating Systems/Hardware

Do we have any networking wizards who want to waste some time on VOIP questions ?

I'm not claiming to be a wizard, but what do you want to know?
@

First off, from a practical standpoint I realize this is overcomplicated and stupid. So I am more interested in a "can it be done" answer than a "You should just ..." answer.

Two incoming pots lines and a 3640 / 3660 router. I want to do point-to-point voip with a couple places in the outside world so the obvious easy method is an NM-2v and a wic-2fxs, plug a phone into the socket and reserve that one phone for voip calls.

But is it possible to run the two incoming telephone lines into a 2fxo, plug two office phones into a 2fxs, and have the router determine which is a normal phone call and which is a voip call, then switch between them internally ?

edit : To answer my own question for posterity, the answer is yes

http://www.cisco.com/en/US/docs/ios/12_ ... fport.html

figure 14, for one example