NEC ELECTRA ELITE IPK II, User Manual

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Electra Elite IPK II Document Revision 4C
IP Station (SIP) – MG16 2 - 561
In voice communication, particularly Internet telephony, the M ean O pinion S core (MOS) provides a
numerical measure of the quality of human speech at the circuit destination. The scheme uses
subjective tests (opinionated scores) that are mathematically averaged to obtain a quantitative indicator
of the system performance. The maximum MOS is 5.0.

IPK II SIP supports a 100 rel option and Session Timer option.

IPK II SIP supports Early Media.

IPK II SIP restricts an outgoing call under the following conditions:

SIP configuration failed

SIP registration failed

CPUII and MG16 Link down

Lack of MG16 DSP resource

Lack of a MG16 bandwidth

Both port numbers can be configured by system data.

ToS Support.
Conditions

SIP IP Station to MEGACO IP Station does not support Peer-to-Peer function and results in
using a DSP resource.
(Version 1600 and 2100 or higher required).

SIP Stations which support RFC 3842 (Message Waiting) receive Message Waiting Lamp
indications.
(Version 1600 and 2100 or higher required).

SIP Station – MG16 does not support NAT traversal.

SIP Station – MG16 does not support a Blind Transfer feature.

SIP station does not support Video Stream.

SIP Station and SIP Trunk required license key for activation. Once activated, the SIP
Client license may be shared between SIP Station and SIP Trunks.

The maximum number of the SIP clients is 256.

SIP protocol (RFC3261) is used.

SIP Station uses the MG16 as a media gateway. Any MG16 can be used as a MG. Master/
Slave setting is not required.

Default UDP listen port for a SIP station is 5070. Both port numbers can be configured by
system data.

IPK II SIP Station registration policy supports an authentication feature. Enabling this policy
prevents the registered telephone from unexpected override.