You don't need no stinking manual just to install a RAD. (grin)
Just plug it in, wait about 30 seconds, dial Feature 9**, give it a password, confirm the password, press data, and follow the prompts. Set your baud rate to 9600 if you need to allow for direct access. It should automatically connect at higher speeds when calling in by remote.
If it already has a password assigned and you don't know what it is, power it down and disconnect it from the Norstar, open it up, take a piece of jumper wire and flash the negative side of the battery (which you will find sticking up on the mother board, looks like a big hearing aid battery) to the positive side a few times.
Put it back together, plug it in, power it up and repeat the process.
Phonehed in Dallas