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Core SIP Functionality

This section describes the core functionality of the SIP stack including the following:

• Authentication

• Host Control Method of SIP 180 Provisional Response Generation

• RFC 2833 (DTMF Digits) Dynamic Payload Negotiation

• Session Timers

• Delayed Media

• RE-INVITE Message

• Codec List in SIP-Initiated Offer

• Send and Receive SIP Signals Using the Same Port

• SIP Notifications of Options

• Disabling the SIP Domain Name System (DNS) Server

Session-Initiation Protocol. A signaling protocol used for establishing sessions in an IP network. A session could be a simple, two-way telephone call, or it could be a collaborative multi-media conference session.