NEC Electra Elite IPK II System User Manual page 577

Electra Elite IPK II
2. IP Address = 192.168.2.200
3. Subnet Mask = 255.255.255.0
4. Default Gateway = 192.168.2.254
CODEC Selection
IP Phones can use various CODECs (Coder/Decoder). A CODEC is a standard for converting an
analog signal to a digital signal. This conversion process is handled by the DSP (Digital Signal
Processors) on VoIP MG16 cards. Each CODEC has different voice quality and compression
properties.
The correct choice of CODEC is based on the available bandwidth, the number of calls required, and the
voice quality required.
CODECs:
G.729. Low bandwidth requirement – Usually used on most Wide Area Network links.

G.711. High bandwidth requirement – usually used on Local Area Networks.

The Elite IPK II IP Phones have a preferred CODEC, called the Audio Capability Priority. This is the
CODEC that is used when calls are initiated. There are five Types (profiles) that can be created and
assigned to IP Phones.
This allows for different CODECs to be used for different groups of IP Phones. In most cases, all IP
Phones belong to the same Type.
To create the CODEC Type (1 ~ 5), use the following programming:
IP Phone Codec Information Basic Setup:
1. 84-11-01 G.711 Audio Frame (default: 3: 30 ms)
2. 84-11-02 G.711 VAD Mode (default: 0 : Disable)
84-11-03 G.711 Type (default: 1: -Law)
3.
4. 84-11-04 G.711 Jitter Buffer Min (default: 30 ms)
5. 84-11-05 G.711 Jitter Buffer Average (default: 60 ms)
6. 84-11-06 G.711 Jitter Buffer Max (default: 120 ms)
7. 84-11-07 G.729 Audio Frame (1 = 10 ms, 2 = 20 ms, 3 = 30 ms) (default: 3)
8. 84-11-08 G.729 VAD Mode (default: 0: Disable)
9. 84-11-09 G.729 Jitter Buffer Min (default: 30 ms)
IP Station (MEGACO) – MG 16
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