I have a 3640 with a 4 port bri module at the central site and a 2500 at the remote. I am using dialer profiles on both routers and am dialing into the 3640 from the 2500 and then wish to initiate call back to the 2500. When I try this it just wont work. I have tried using the dialer callback xxxx callback command on the server plus all the other commands but it just wont dialer back the client. Anyone got any ideas.