MediaPack SIP
MediaPack SIP User’s Manual 18 Document #: LTRT-65405
The layout diagram (Figure 1-1), illustrates a typical MediaPack VoIP application.
Figure
1-1: Typical MediaPack VoIP Application
1.3 SIP Overview
SIP (Session Initialization Protocol) is an application-layer control (signaling) protocol used on the
MediaPack for creating, modifying, and terminating sessions with one or more participants. These
sessions can include Internet telephone calls, media announcements and conferences.
SIP invitations are used to create sessions and carry session descriptions that enable participants
to agree on a set of compatible media types. SIP uses elements called Proxy servers to help
route requests to the user's current location, authenticate and authorize users for services,
implement provider call-routing policies and provide features to users.
SIP also provides a registration function that enables users to upload their current locations for
use by Proxy servers. SIP, on the MediaPack, complies with the IETF (Internet Engineering Task
Force) RFC 3261 (refer to http://www.ietf.org
).
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