NEC ELECTRA ELITE IPK II, Features And Specifications Manual

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Electra Elite IPK II Document Revision 1
IP Station (MEGACO) - MG 16 2 - 481
Programming - VoIP MG16
1. 84-05-01 VoIP MG16 IP Address Setup (Slot No.) = 192.168.1.21
Programming - System IP Phones
1. DHCP Mode (Disabled)
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 into 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 will be based on the amount of bandwidth available, the amount of calls
required, and the voice quality required.
CODECs:
J
G.729. Low bandwidth requirement, and is used on most Wide Area Network links.
J
G.711. High bandwidth requirement - usually used on Local Area Networks.
The Elite IPK II IP Phones have a preferred CODEC, known as the “Audio Capability Priority”. This is
the CODEC that will be used when calls are initiated. There are 5 “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 will 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 G711 Audio Frame (default: 3 = 30ms)
2. 84-11-02 G711 VAD Mode (default: 0:Disable)
3. 84-11-03 G711 Type (default: 1: Mu-Law)
4. 84-11-04 G711 Jitter Buffer Min (default: 30ms)
5. 84-11-05 G711 Jitter Buffer Type – values are set in “ms” (default: 60ms)