You are here: CSP Developer’s Guide: Internet Protocol > 5 Session-Initiation Protocol (SIP) Software > Core SIP Functionality
This section describes the core functionality of the SIP stack including the following:
• Host Control Method of SIP 180 Provisional Response Generation
• RFC 2833 (DTMF Digits) Dynamic Payload Negotiation
• 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