D-Link VOIP TA DVG-5112S - Manual (Page 32)

DVG-5112S User’s Manual
D-Link Systems, Inc. 32
3-17 Codec Settings
Preferred Codec Type: Since different voice codecs have different compression ratios, the sound
quality and occupied bandwidths are also different. It is recommended that you use the default
provided (G.723.1) because it occupies less bandwidth and will provide better sound quality.
Jitter Buffer: Adjusts the jitter for receiving packets. If the jitter range is too wide, it will delay voice
transmission.
Silence Suppression: If one side of a connection is not speaking, the system will stop sending voice
data (packets) to decrease bandwidth usage.
Echo Canceling: Prevents poor telecommunication quality caused by echo interference.
Codec: Choose the codec that you need.
Packet Time: Defines how long the gateway sends a RTP packet or voice packet to the receiving side.
The smaller the value, the greater the bandwidth usage, but larger values increase voice delay.
Approximate Bandwidth Required: The bandwidth required varies with codec format and packet
time.