Chapter 28. Sip Gateway Management; Introduction To Sip Gateway Features - Samsung Ubigate iBG3026 Configuration Manual

CHAPTER 28.

Introduction to SIP Gateway Features

Information about SIP
SIP is a simple, Text-based protocol that uses requests and responses to
establish communication among the various components in the network and to
ultimately establish a conference between two or more endpoints
SIP Capabilities
Determines the location of the target endpoint
SIP supports address resolution, name mapping, and call redirection.
−
Determines the media capabilities of the target endpoint
SIP determines the lowest level of common services between the endpoints
−
through Session Description Protocol(SDP). Conferences are established
using only the media capabilities that can be supported by all endpoints.
Determines the availability of the target endpoint
If a call cannot be completed because the target endpoint is unavailable,
−
SIP determines whether the called party is connected to a call already or
did not answer in the allotted number of rings. SIP then returns a
message indicating why the target endpoint was unavailable.
Establishes a session between the originating and target endpoints
If the call can be completed, SIP establishes a session between the
−
endpoints. SIP also supports mid-call changes, such as the addition of
another endpoint to the conference or the changing of a media
characteristic or codec.
© SAMSUNG Electronics Co., Ltd.
SIP Gateway Management
Ubigate iBG3026 Configuration Guide
337