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1725-86984-000_P.docx
September 2016
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Appendix B: Session Initiation Protocol
(SIP) Information
This chapter describes the basic Session Initiation Protocol (SIP) and the protocol extensions
that the current Spectralink Software supports.
This chapter contains information on:
Basic Protocols
—All the basic calling functionality described in the SIP specification is
supported. Transfer is included in the basic SIP support.
Protocol Extensions
—Extensions add features to SIP that are applicable to a range of
applications, including reliable 1xx responses and session timers.
For information on supported RFCs and Internet drafts, see the following section.
This chapter also describes:
Reliability of Provisional Responses
SIP for Instant Messaging and Presence
RFC and Internet Draft Support
The following RFC’s and Internet drafts are supported. For more information on any of the
documents, enter the RFC number at
RFC 1321
—The MD5 Message-Digest Algorithm
RFC 2327
—SDP: Session Description Protocol
RFC 2387
—The MIME Multipart / Related Content-type
RFC 2976
—The SIP INFO Method
RFC 3261
—SIP: Session Initiation Protocol (replacement for RFC 2543)
RFC 3262
—Reliability of Provisional Responses in the Session Initiation Protocol (SIP)
RFC 3263
—Session Initiation Protocol (SIP): Locating SIP Servers
RFC 3264
—An Offer / Answer Model with the Session Description Protocol (SDP)