LevelOne WBR-3470 - Manual (Page 98)

during calls if voice activated dialing (VAD) is enabled. If echo cancel is not enabled and
VAD is enabled at the remote end of the connection, the user hears nothing when the remote
party is not speaking.
Voice Activity Detection: The voice activity detection (VAD) is a component in the DSP
software that examines a caller's incoming signal and determines if the signal contains
significant energy and is likely to be speech rather than a click.
Default Codec: Default voice codec.
ULAW size, ALAW size G.729 size, G.723 size: One RTP packet is sent out on every
specified time cycle.
~
G.711μ-LAW: It is a basic non-compressed encoder and decoder technique. μ-LAW uses
pulse code modulation (PCM) encoder and decoder to convert 14 bit linear sample. 64kbps
bandwidth is needed.
~
G.711A-LAW: It is a basic non-compressed encoder and decoder technique. μ-LAW uses
pulse code modulation (PCM) encoder and decoder to convert 13 bit linear sample. 64kbps
bandwidth is needed.
~
G.729A: Using G.729A to encoder/decoder voice information into a single packet reduces
the bandwidth consumption (8kbps only) while you still can have good sound quality.
Country: Define user location to fit the local Telco system requirements.
Caller ID Display: Enable / disable Caller ID.
Stun Server: Simple Traversal of UDP through NAT. This function is used for NAT
traversal.
UPNP Enable: Universal Plug and Play. This function is used for NAT traversal.
RTP Port: Initial port number for sending RTP packets.
RTP TOS: Type of Service value for Quality of Service.
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