[nsp] Serial procotol keep bouing

[Tatsuya Kawasaki]

Cisco users,

Say the router sits on 40th floor of the building, but teleco demarc is at basement of the building,  from my past experience, cisco 1600/1700 with ineral wic does not seem to hold the protocol up though the line itself is good.
Is there any rule of sum that I can use to determine which router to use or how to solve this type of problem?

Tatsuya