NEC Electra Elite IPK II System User Manual page 557

Electra Elite IPK II
The IAD(8)-U( ) ETU supports station to station direct RTP connections (peer-to-peer) for calls

between IP Phones that provide the following benefits:
Improved voice quality for calls between two IP Phones.
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Improved bandwidth performance for voice between IP Phones.
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The operating mode can be configured per IAD(8)-U( ) ETU on each port.
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Pad and echo canceller controls are built-in and are programmable in the IAD(8)-U( ) ETU.
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The LAN/WAN connection is provided by a 10 Base-T/100 Base-TX Ethernet.
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In voice communication, particularly Internet telephony, the Mean Opinion Score (MOS) provides a
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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.
Conditions
The Synchronous Ringing feature is not supported for IP Terminals. The ITH-16D-2/3 and

ITH-8D-2/3 Multiline Terminals have user programmable ringing options. Group listening is
not supported by (MEGACO) IP stations.
Station Relocation is not supported by (MEGACO) IP stations or IPK Soft Phones.
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Not all data networks can support Voice over Internet Protocol (VoIP). A good VoIP

network solution requires low-latency, low jitter, and low packet loss. Accordingly, the
network must be evaluated for these factors to determine whether or not it can provide
toll-quality speech paths.
When 5-, 6-, or 7-digit station numbers are used, this feature is not available.
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Night Mode is indicated as N on an IPK Soft Phone.
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If call forwarding is set for an IP station, the system continues to follow the call forwarding,
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even if the station loses power or LAN connection.
If both Call Forward Busy and Call Forward No Answer are set, the system follows the Call
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Forward No Answer setting, even if the station loses power or LAN connection.
MEGACO station registration is solely dependant upon extension registration and not MAC

registration. Program 15-05-02 can only be viewed after an IP station has been registered
(read only).
Default Setting
None
System Availability
IP Station (MEGACO) – IAD (Integrated Access Device)
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