Administrator’s Guide for SIP-T58V/T58A/T56A/CP960 IP Phones290NoteVAD is used to send CN packets when the phone detects a “silence” period; CNG is used to generate comfortable noisewhen the phone receives CN packets from the other side.TopicCNG ConfigurationCNG ConfigurationThe following table lists the parameter you can use to configure CNG.Parameter voice.cng .cfgDescription It enables or disables the CNG (Comfortable Noise Generation) feature.Permitted Values 0-Disabled1-EnabledDefault 0Web UI Settings->Voice->Echo Cancellation->CNGJitter BufferYealink phones support two types of jitter buffers: fixed and adaptive. A fixed jitter buffer adds the fixed delay to voicepackets. You can configure the delay time for the static jitter buffer on the phones. An adaptive jitter buffer is capableof adapting the changes in the network's delay. The range of the delay time for the dynamic jitter buffer added to pack-ets can be also configured on the phones.TopicJitter Buffer ConfigurationJitter Buffer ConfigurationYou can configure the mode of jitter buffer and the delay time for jitter buffer in the wired network or wireless network.The following table lists the parameters you can use to configure the jitter buffer.Parameter voice.jib.adaptive .cfgDescription It configures the type of jitter buffer in the wired network.PermittedValues0-Fixed1-AdaptiveDefault 1Web UI Settings->Voice->JITTER BUFFER->TypeParameter voice.jib.min .cfgDescriptionIt configures the minimum delay time (in milliseconds) of jitter buffer in the wired network.Note: It works only if “voice.jib.adaptive” is set to 1 (Adaptive). The value of this parameter should be lessthan “voice.jib.max” and “voice.jib.normal”.PermittedValues Integer from 0 to 400
