CONFIGURING THE VOICE ADSL ROUTER
Port Advanced Setting
There are 11 advanced functions that can be configured in this screen.
•Volume Gain Control: Two modes are available. The fixed gain control means the device is supported to supply a constant level of amplification.
The adaptive mode means a specified power level is produced at the output during periods of active speech.
•Jitter Buffer Mode: Three jitter modes are available. The fixed mode, which is the default mode, is a simple first in first out mode, with a fixed jitter buffer delay.
The adaptive mode optimizes the size of the jitter buffer delay in response to network conditions.
The sequential mode is also a fixed jitter buffer delay mode, but in this mode the jitter buffer function looks at the packet number for dropped or out of sequence packet problems.
•Jitter Buffer Delay: This parameter represents the delay in milliseconds that the jitter buffer waits before it transmits the data samples that are collected from the host processor to the CODEC.
•Echo Canceller Delay: This is the function that filters out echoes occurred during periods of active speech.
•VAD (Voice Activity Detection): If this box is checked, only a certain level of voice volume will be send out as voice packets. This function is designed to save the bandwidth.
•CNG (Comfort Noise Generation): Check this box to enable the Comfort Noise Generation function. When no one is talking on a call this feature will generate comfort noise in the background so you know the call is active.
