We use a 3825 router and everytime we load our configuration template we get an error. When the config reaches the Serial0/0/0:23 and 0/0/1:23 it inputs a command "ISDN bind-L3 ccm-manager". It responds back with "Call Manager backhaul registration failed. Unable to setup ISDN layer 3 protocol on interface". At the end of our load our ISDN "D" Channel on our VX900 (net.com) does not come up. If I remove the statement from either serial port, the ISDN channel on the VX will come up but the call is only ringing at the distant end and no voice. Afterwards, I will reboot the VX and only then will I be able to make successful calls. We also have MGCP control bind and MGCP media bind assigned to the Gigabit interface attached to the VX T1 and a Fast Ethernet for network access Via Telnet attached to the switch.