We have a new installation of a t1 line. I am using external CSU/DSU with cisco 1600 and 3600 router on each end. Framing and line coding is SF/AMI and clocking is internal. I have setup the clock to internal on one CSU/DSU and external on other. I am able to connect the two sites but getting very poor performance and lots of CRC errors.
This setup is for testing only. Ultimately I have to use the T1 CSU/DSU WIC in the 1600 router. Can somebody help me. Its urgent.