You can record how the PPP layers process a call by enabling the PPPLOG file. This file contains some of the basic layers and points of any Dial-Up Networking session, and is especially useful for monitoring PPP sessions. It is recorded and stored in the Windows directory.
The following is sample content of a PPPLOG.TXT file:
Sample PPPLOG.TXT
09-01-1994 18:14:22  - Remote access driver log opened.
09-01-1994 18:14:22  - Server type is  PPP (Point to Point Protocol).
09-01-1994 18:14:22  - CCP : Layer initialized.
09-01-1994 18:14:22  - NBFCP : Layer initialized.
09-01-1994 18:14:22  - FSA : Control protocol 2180 will not be 
                  negotiated.
09-01-1994 18:14:22  - IPXCP : Layer initialized.
09-01-1994 18:14:22  - FSA : Encrypted Password required.
09-01-1994 18:14:22  - LCP : Layer initialized.
09-01-1994 18:14:22  - LCP : Will try to negotiate callback.
09-01-1994 18:14:22  - LCP : Layer started.
09-01-1994 18:14:22  - LCP : Received and accepted ACCM of 0.