RFC 2637:Point-to-Point Tunneling Protocol (PPTP)
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service


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... It is envisioned that there will be a many-to-many relationship between PACs and PNSs. A PAC may provide service to many PNSs. For example, an Internet service provider may choose to support PPTP ...
... PAC may provide service to many PNSs. For example, an Internet service provider may choose to support PPTP for a number of private network ...


... control connection relies on a standard TCP connection for its service. The PPTP control connection protocol is not distinguishable ...
... indicate analog call type. ISDN calls should indicate digital when unrestricted digital service or rate adaption is used and analog if digital modems ...
... an authorized user - The bearer service is not authorized or supported If the PNS chooses to accept the call, it responds with an Incoming- ...



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