NEC ELECTRA ELITE IPK II, General Description Manual

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Electra Elite IPK II Document Revision 1
General Description Manual 2 - 39
There can be only one Media Gateway Controller assigned in the Electra Elite IPK II.
This determination will be made in KSU Programming [84-05-03] Master/Slave
determination. The "Media Gateway Controller" performs the duties of interpreting
UDP signaling messages between the Elite IPK II Processor and IP Stations. Any
additional MG16 ETUs added to the system will be known as Media Gateway cards.
The media gateway card controls and interprets RTP messaging from the IP Phone to
the Elite IPK II Processor.
If a non-System IP Phone (e.g., POT, System Phone), or trunk line is required, a
DSP resource is needed. If while on a peer-to-peer call, DSP resources are not
utilized and the MG16 port is not accessed, only Media Gateway Controller
processing is utilized. If, while on a peer-to-peer call, a conference call is formed, the
peer-to-peer connection is released and a new non peer-to-peer connection is
created using the MG16 DSP resources - two ports will the utilized on the MG16 ETU.
If the third party drops out of the conversation, the call reverts to a peer-to-peer call.
A maximum of 16 PVA( )-U( ) ETUs can be installed supporting the maximum of 256
IP stations.
The MG supports only those vocoders that are approved to provide toll-quality speech
path. The following voice compression methods are supported for the IP Station
(MEGACO) application:
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G.711 uLaw - Highest Bandwidth
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G.729 - Mid-Range Bandwidth
IP Trunk – H.323 Protocol
The Electra Elite IPK II Voice over IP Trunk Card H-323 package sends the real-time
voice over the corporate LAN or WAN. The voice from the telephone is digitized and
then put into frames to be sent over a network using Internet Protocol.
The Electra Elite IPK II Voice over IP Trunk Card H.323 package allows the ability to
communicate using standard H.323 (Normal and Fast Start) Protocol and allows
connectivity to any H.323 standards compliant voice gateway and gatekeeper. This
VoIP Trunk Card also provides Registration and Authentication Server (RAS) support
with the ability to register with an RAS Server and use Gatekeeper for dynamic call
routing.
The IAD (8)-U10 ETU - H.323 is an optional interface that can provide IP trunks and
tie lines. It can operate in the following modes:
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COI
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COID
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DID