1.0 Introduction

This document describes the Point-to-Point Tunneling Protocol (PPTP) developed by the PPTP forum. The forum consists of the following organizations: Ascend Communications, Microsoft Corporation, 3Com/Primary Access, ECI-Telematics, and U.S. Robotics.

The PPTP protocol is designed to perform the following tasks:

Query the status of comm servers

Provide in-band management

Allocate channels and place outgoing calls

Notify Microsoft® Windows NT® Server on incoming calls

Transmit and receive user data with flow control in both directions

Notify Windows NT Server on disconnected calls

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