I attempted to migrate my 2821 MGCP gateway to a new PRI from its current T1 CAS and the lines seized. I was wondering if I followed an improper sequence of actions. I created a new gateway in Callmanager 4.1.3 for the PRI. I unregistered the current gateway then registered the new gateway. I then moved the t1 cable to the new circuit demark. My next action was to recode the controller t1 on the 2821. I was able to change the framing and linecode but not the timeslot and service. When I did a 'sho voice port sum", it still read as e&m with the lines seized. Rebooting the 2821 did not help. In order to get back to working order I had to register the origianl gatewayof course but also had to rebuild MGCP. What steps did I miss or perform out of order? I need to get this circuit going. The client is desperate for caller ID. Any guidance would be appreciated. Thanks.