ZyXEL Communications 10~100 Series Network Router User Manual


 
ZyWALL 10~100 Series Internet Security Gateway
PPTP 7-3
Diagram 7-3 Example Message Exchange between PC and an ANT
PPP Data Connection
The PPP frames are tunneled between the PNS and PAC over GRE (General Routing Encapsulation, RFC
1701, 1702). The individual calls within a tunnel are distinguished using the Call ID field in the GRE header.