I was wondering what the "AR serial int" and "CR serial int" stand for in the setup directions for a ppp T1 connection. I realize that they are the IP addresses of the serial interfaces on the router at the client site and ISP site, but I am wondering what they stand for.
What do these abbreviations stand for?
Also I was wondering about the IP addresses that I was assinged. I was given a 255.255.255.252 mask. I have .248 for the WAN link IP, .249 for the AR serial int ip, and .250 for the CR serial int ip. With this subnet mask, how is it that the .248 can be used as an IP, shouldnt it be the subnet ID? And is .251 used as the broadcast address?