User Agent Library

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Detailed Description

This is the high level user agent library, which consists of:

• INVITE Session, to encapsulate INVITE sessions and SDP negotiation in the session,
• Client Registration, high level client registration API, and
• SIP REFER (RFC 3515) for Call Transfer etc..

More detailed information is explained in PJSIP Developer's Guide PDF document, and readers are encouraged to read the document to get the concept behind dialog, dialog usages, and INVITE sessions.

The User Agent Library is implemented in pjsip-ua static library.

Table of Contents
	100rel/PRACK - Reliability of Provisional Responses
	PRACK - Reliability of Provisional Responses.
	INVITE Session
	Provides INVITE session management.
	Client Registration
	High Layer API for performing client registration.
	SIP Replaces support (RFC 3891 - "Replaces" Header)
	SIP Replaces support (RFC 3891 - "Replaces" Header).
	SIP REFER (RFC 3515) for Call Transfer etc.
	SIP REFER dialog usage (call transfer, etc.).