NEC Electra Elite IPK II System User Manual page 584

Document Revision 4C
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
feature). his may be a combination of SIP and or MEGACO Stations.
T
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).
Transmit
Codec
Data Rate
G711 90 Kbps

-Law
G729 34 Kbps
When an IP Soft Phone is connected, set Time Between Packets to 100 ms.

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

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.
2 - 560
Receive
Between
Data Rate
Packets
90 Kbps 20 ms
34 Kbps 20 ms
uses SIP Protocol to provide telephony services between remote stations
Time
Packetization
Delay
1.5 ms

15.0 ms

Electra Elite IPK II
in the Universal Slots
Theoretical
Default Jitter
Maximum
Buffer Delay
MOS
2 datagrams 4.4
(40 ms)
2 datagrams 4.07
(40 ms)
IP Station (SIP) – MG16