Electra Elite IPK II Document Revision 4C
IP Trunk (SIP) – MG16 2 - 577
IP Trunk (SIP) – MG16
Description
SIP (Session Initiation Protocol) is used for Voice over IP (VoIP). It is described in the IETF (Internet
Engineering Task Force) RFC3261. Commonly called SIP Trunking, this feature is used for linking a key
telephone system to the publicly available voice services using SIP.
SIP analyzes requests from clients and retrieves responses from servers, then sets call parameters at
either end of the communication, handles call transfer, and termination.
Typically, such features, including but not limited to Voice over IP services, are available from an SIP
service provider. The SIP trunks on the Electra Elite IPK II can connect to a service provider over a
broadband connection for implementing Voice over IP lines to the IPK II user.
The call routing, call features, and speech handling (RTP) are the same as other trunks in the Electra
Elite IPK II system – only the signaling protocol is different. With the IPK II, SIP trunks can receive
incoming calls with Caller ID, place outgoing calls, and transfer SIP trunks to IP, SIP, analog and digital
stations, and across a network.
The Media Gateway (MG16) is an IP Application loaded on the PVA(X)-U( ) ETU. This is an optional
interface package for the Electra Elite IPK II system that supports SIP Trunks, SIP Stations, and
MEGACO IP stations. This is a required component of SIP implementation in Elite IPK II.
An on-board RJ-45 connector provides a WAN/LAN connection. Voice and signaling data to/from the IP
stations are converted into IP Frames and transmitted through the Data Communication IP Network.
Media Gateway 16 supports a maximum of 16 Voice over IP connections.
Each Media Gateway 16 application can support up to 16 TDM Talk paths. This total may be shared
among SIP Station or SIP Trunks. Registered SIP Stations and/or SIP Trunks require a one-to-one
relation with the MG16 DSP Resource.
The Electra Elite IPK II CPUII contains a regular TCP/RTP/IP stack that handles real-time media,
supports industry standard SIP (RFC 3261) communication on the WAN side, and interfaces with the
MG16 Application.
Enhancements
This feature added with Version 1500.
Version 2000 supports the Combined functionality of a MG16 and K-CCIS over IP and SIP Stations/
trunks on one card.
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