AudioCodes Mediapack mp-11x, Руководство пользователя

Страница: 21 / 390

Version 5.2 21 August 2007
SIP User's Manual 1. Overview
„ LEDs on the front panel that provide information on the operating status of the media
gateway and the network interface.
„ Reset button on the rear panel that restarts the MP-11x gateway, and is also used to
restore the MP-11x parameters to their factory default settings.
1.2.2 MP-124 Hardware Features
The MP-124 hardware features include the following:
„ MP-124 19-inch, 1U rugged enclosure provides up to 24 analog FXS ports, using a
single 50-pin Telco connector.
„ LEDs on the front and rear panels provide information on the operating status of the
gateway and the network interface.
„ Reset button on the front panel restarts the MP-124 gateway, and is also used to
restore the MP-124 parameters to their factory default settings.
1.3 SIP Overview
Session Initialization Protocol (SIP) is an application-layer control (signaling) protocol used
on the gateway 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 implemented in the gateway, complies with the Internet
Engineering Task Force (IETF) RFC 3261 (refer to
http://www.ietf.org ).