I have a Cisco 4700 that is feeding F/R (yes F/R Switching is activated) to a remote router (Cisco 1601 w/WIC-T1-DSU). On the 4700 side we are using an Adtran Smart16e Shelf w/ V.35 TSU cards. The 4700 is set to FRAME-RELAY INTF-TYPE DCE and that is required to bring the connection up. I have the local end (Adtran) set to CLOCK SOURCE NETWORK and DTE TX CLOCK INT-INV. The 1601 is set to CLOCK SOURCE LINE. This is our own infrastructure of copper so there is no Qwest involved to provide the clocking on the circuit. The circuit contains to go up and down many times a day. This configuration seems to be working with other circuits but I am not sure on whether or not the clocking is set up right. How do I set up either the Adtran or the 1601 to be the master clock source? Or...how do I insert a clock source to the network? Do I need to use the CLOCK RATE command on both ends? FYI...Cisco TAC has cleared the configs on both sides as "working". I know it's a clocking issue but not sure where to start.