NEC ELECTRA ELITE IPK II, User Manual

Page: 584 / 1190

Document Revision 4C Electra Elite IPK II
2 - 560 IP Station (SIP) – MG16
A maximum of 16 PVA(X)-U( ) ETUs can be installed supporting the maximum of 256 IP stations (refer
to
Table 2-43 Maximum System Capacities for Application Interface ETUs in the Universal Slots
feature).
T
his may be a combination of SIP and or MEGACO Stations.
The MG supports only those codecs that are considered to provide toll-quality equivalent speech path.
The following voice compression methods are supported for the IP Station SIP feature:

G.711

Law – Highest Bandwidth

G.729 – Mid-Range Bandwidth
The minimum bandwidth requirements for each voice call is listed in the following table. This includes all
the overhead of VoIP communication, including signaling).

The MG16 contains a regular TCP/RTP/IP stack that can handle real time media. The MG16 ETU
is an end-point on the IP network from the network administration perspective.

The Elite IPK II
CPU
uses SIP Protocol to provide telephony services between remote stations
through the IP Network. This is an IETF/ITU standards-based protocol.

Speech-connection audio quality depends greatly on the available bandwidth between the stations
in the data network. Because Internet is an uncontrolled data network compared to an Intranet,
using this application in Intranet WAN environment with known (or controlled and assured) Quality
of Service (QoS) is highly recommended.

A static IP Address is required for each MG16 in the network.

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.

Duplex mode (Auto, Full, or Half) and speed (10 or 100 mbps) are configured via Elite IPK II KSU
Programming.
Codec
Transmit
Data Rate
Receive
Data Rate
Time
Between
Packets
Packetization
Delay
Default Jitter
Buffer Delay
Theoretical
Maximum
MOS
G711

-Law
90 Kbps 90 Kbps 20 ms

1.5 ms 2 datagrams
(40 ms)
4.4
G729 34 Kbps 34 Kbps 20 ms

15.0 ms 2 datagrams
(40 ms)
4.07

When an IP Soft Phone is connected, set Time Between Packets to 100 ms.