D-Link DIV-140 manual Audio Configuration

Audio Configuration

Codec Priority: Here you can select the priority of audio codecs. While establishing a call, the DlV-140 will negotiate the highest priority of codec acceptable to both parties. The administrator can choose from four codecs. G.711 Mu and G.711 A provide the best voice quality but consume the most bandwidth. G.723 consumes less bandwidth with some compromise on quality. G.729 is a compromise between both. It uses significantly less bandwidth as compared to G.711 and gives better quality as compared to G.723.

Jitter Buffer Delay: The Jitter Buffer monitors network conditions and implements a delay profiling algorithm that provides better tracking of adaptive jitter buffer and improves voice quality.The jitter buffer automatically determines the network jitter, maintains the desired packet loss rate, subject to the limit of the maximum allowed jitter delay. These parameters can be configured here.

The Jitter Buffer Delay specifies the maximum desired jitter delay in milliseconds. Range: 0 to 500 milliseconds. Default: 150 milliseconds.

Packet Loss Rate: Specifies the allowable packet loss rate in 0.1% units. Range: 0 to 50 (corresponding to 0.1 % to 5.0 %). Default: 1 (0.1%).

Gain Settings: The volume settings at various levels can be configured here. Here Tx field specifies stream going from this device to IP network and Rx specifies the stream coming to this device from the IP network.

VoIP: Increase this value to digitally amplify the signals.

Range: -40 dB to 15 dB. Default: 0 dB.

PSTN: Increase this value to amplify the signals at analog

level. Range: 0 or 1 (corresponding to 0 and 6 dB). Default: 0.

Tone: Modify this value to set the volume level of tones.

Range: -20 dB to 15 dB. Default: -12 dB.

D-Link DIV-140 User Guide 13