Before a machine can dial out over the PPP link, you must edit these files in its UUCP database:
/etc/uucp/Devices
/etc/uucp/Dialers
/etc/uucp/Systems
You must edit these files for remote hosts serving as PPP dial-out machines. Additionally, you must edit these files on the dial-in server if it is to dial out to the remote hosts (a requirement for multipoint dial-in servers). Chapter 25, Overview of UUCP describes these files in detail.