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SIP

Fusion Embedded™ SIP Stack

Embedded Session Initiation Protocol (SIP) Software Stack

The Fusion Embedded™ SIP stack is at the heart of Unicoi's Voice over Internet Protocol (VoIP) offerings, such as InstaVoIP. Fusion Embedded SIP software stack is a lightweight, transport-independent, text-based protocol suite designed for use in IP phones, VoIP gateways, RoIP devices, and other IP-enabled products.

Note: For information on the security-enhanced implementation of Fusion SIP, go to our Fusion SIPS page.

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Embedded SIP Software Stack

Fusion Embedded SIP stack source code is specifically designed for use in embedded devices, has a small footprint, and is completely ROMable and re-entrant. The Fusion Embedded SIP stack provides a simplified API for easy integration with the application and transport stack (TCP/IP).

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Fusion Embedded SIP Features

  • Supports TCP and UDP
  • Supports proxy and redirect servers
  • Provides the functionality to support call hold, call waiting, call transfer, call forward, etc.
  • SIP Message Generator: INVITE, ACK, BYE, OPTIONS, CANCEL, REGISTER, NOTIFY, SUBSCRIBE, INFO, and REFER
  • SDP message generators
  • User Agent Client and Server
  • Timer manager
  • SIP/SDP message parsers
  • Configurable parameters for default SIP and RTP port numbers
  • Instant Messaging
  • IPv6 compliant
  • SIP response generator
  • 100% ANSI C compliant SIP stack source code
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RFC Compliance

  • RFC 2617 (Basic and Digest Authentication)
  • RFC 2976 (Info Method)
  • RFC 3261 (SIP Version 2)
  • RFC 3262 (Reliability of Provisional Responses in SIP)
  • RFC 3263 (Locating SIP Servers)
  • RFC 3265 (Specific Event Notification)
  • RFC 3420 (Internet Media Type message/sipfrag)
  • RFC 3515 (Refer Method)
  • RFC 3842 (Message Summary and Message Waiting)
  • RFC 3891 (The Session Initiation Protocol (SIP) Replaces Header)
  • RFC 3892 (The Session Initiation Protocol (SIP) Referred-By Mechanism)
  • RFC 3959 (Sender & Receiver Tables for Session Members)
  • RFC 2327 (Session Description Protocol SDP)
  • RFC 3264 (Offer/Answer Model with SDP)
  • RFC 2778 (A Model for Presence and Instant Messaging)
  • RFC 3858 (XML Based Format for Watcher information)
  • RFC 3863 (A Presence information data format PIDF)
*Call or email for a complete list of RFCs.
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Fusion Embedded™ Fully Integrated Protocols

Voice & Video Protocols

Security Protocols

*Hover mouse over protocol for info

Phone: 678-208-2250 E-mail: sales@unicoi.com