Thanks for all of the replies about this. I'm hoping it will work out  
well. I curious about was if an IPSec tunnel will add complexity or  
unreliability into the equation than is really needed Bandwidth  
should be OK (~500 & ~750Kbps actual upstream throughput = 3+ calls w/ 
ULAW = no problem), A Net4801 on one end and a P133 on the other.

Since I do have static IP addresses and asterisk at both ends, it  
should be fairly easy to do it without IPSec. But, IPSec might allow  
for more flexibility as I could easily register phones to either end  
(or both) without having NAT issues with the SIP based phones. But,  
with asterisk at both ends, I probably don't need it, and probably  
don't really need the IPSec tunnel. However it might allow for a more  
convenient or flexible setup - especially when configuring other  
network services/devices to work seamlessly for them.

I may be back for more help soon...static routes and IPSec are new  
for me and suggestions are still welcome.

Thanks!
Aaron