D-Link DVG-5112S User Manual page 37

DVG-5112S User's Manual
3-2-1-4 Codec
ADVANCED → VoIP → Codec
Preferred Codec Type: Select a preferred codec type for all calls. Since different voice codecs have
different compression ratios, the sound quality and occupied bandwidths are also different. The factual
codec may determine by the called party. It is recommended that you use the default provided (G.723.1)
codec because it occupies less bandwidth and provides better sound quality.
Jitter Buffer: Enter the jitter of receiving packets.
Silence Detection / Suppression: Check the box to enable the silence packets and send less voice
data (package) during the silent period while talking.
Echo Canceling: Check the box to remove echo and improve voice quality during conversation.
Codec: Check the box to codec for the VoIP Telephone Adapter to support. All codecs are selected and
supported by default. You can un-check the box that is not used.
Packet Interval: Select the frame size of voice package from different codec. It defines the time interval
for the VoIP Telephone Adapter to send a RTP packet or voice packet to the receiving side. The smaller
the value, the greater the bandwidth takes, and larger values might cause voice delay.
Approximate Bandwidth Required: It shows the bandwidth required from different codec and packet
interval.
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ADVANCED