Chapter 12. SIP

This chapter does not provide a full Session Initiation Protocol (SIP) specification. Instead, it tries to point out the important aspects of SIP as they apply to the Internet Protocol Multimedia Subsystem (IMS). In particular, this chapter does not discuss how a SIP entity should behave using the maddr parameter in Uniform Resource Identifiers (URIs) nor does it explain how the SIP entity should behave in certain error conditions. For a full SIP specification please refer to [RFC3261].

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