Connecting an External Modem to Aux /Console port

[ldato]

I need help to enable callback on 1721 router to AUTHENTICATION with radius and 3620 PRI to call the remote router. I have found some documentation, but not the correct documentation in setup call back..

[#2]

Configuring ppp callback with authentication using Radius server is pretty simple.I think the following url completely explains the callback and radius authentication.It is self explanatory.Refer the following url's document:

http://www.cisco.com/warp/public/480/pppcallback_rad.html