Question : Problem: How to configure a point to point connection on a Cisco 1841 Router?

I have two sites that need connectivity to each other.  They have ordered a Point-to-Point T1 circuit between locations, but the telecom company does not provide nor configure the routers.  I am pretty familiar with basic routing, but I have never setup a point to point before.  What would be a sample IP and mask to use on the serial connections (There are T1 WIC cards installed in the routers) to use.  What routing statements need to be used?

Answer : Problem: How to configure a point to point connection on a Cisco 1841 Router?

Use anything you want for the wan link with /30 mask, ie.
 192.168.255.0 /30  gives you .1 on one side and .2 on the other side

Static routes should be all you need. Remote end has static default pointing to main site with Internet connection. The configs are quite simple

REMOTE:
 interface fast 0/0
 ip add 192.168.232.1 255.255.255.0
 no shut
interface serial 0/0/0
 ip add 192.168.255.2 255.255.255.252
 no shut
ip route 0.0.0.0 0.0.0.0 192.168.255.1

MAIN SITE:
 interface fast 0/0
 ip add 192.168.111.2 255.255.255.0
 no shut
interface serial 0/0/0
 service-module t1 clock source internal  <== one end only provides clocking
 ip address 192.168.255.1 255.255.255.252
 no shut
ip route 0.0.0.0 0.0.0.0 192.168.111.1   <= gateway out local firewall
ip route 192.168.232.0 255.255.255.0 192.168.255.2

! Done

The KEY is that the local hosts at the MAIN site no longer use the firewall as their default gateway, they must use the Fast 0/0 local ip address as their gateway and let the router determine where to send packets.