Weed Eater 2600 manual Voice Quality Tuning Commands, Configuring Adaptive Jitter Adjustment

Cisco High-Density Analog Voice and Fax Network Module

Configuration Tasks

Voice Quality Tuning Commands

The commands in this section configure parameters to improve voice quality. Common voice quality issues include the following:

•Configuring Adaptive Jitter Adjustment (optional)

•Configuring Echo Adjustment (optional)

•Configuring Voice Level Adjustment (optional)

Configuring Adaptive Jitter Adjustment

To configure the playout delay jitter buffer, use the following commands beginning in dial-peer or voice-port configuration mode:

	Command		Purpose
Step 1
	Router(config-voiceport)# playout-delay mode {adaptive		Determines the mode in which the jitter buffer will
	fixed}		operate for calls on this voice port.
			The keywords are as follows:
			• adaptive—Adjusts the jitter buffer size and
			amount of playout delay during a call based on
			current network conditions.
			• fixed—Defines the jitter buffer size as fixed so
			that the playout delay does not adjust during a
			call. A constant playout delay is added.
			The default is adaptive.
Step 2
	Router(config-voiceport)# playout-delay{nominal value		Tunes the playout buffer to accommodate packet
	maximum value minimum {default low high}}		jitter caused by switches in the WAN.
			The keywords and arguments are as follows:
			• nominal—Defines the amount of playout
			delay applied at the beginning of a call by the
			jitter buffer in the gateway. In fixed mode, this
			is also the maximum size of the jitter buffer
			throughout the call.
			• value—Specifies the range that depends on
			type of DSP and configured codec complexity.
			For medium codec complexity, the range is
			from 0 to 150 ms. For high codec complexity
			and DSPs that do not support codec
			complexity, the range is from 0 to 250 ms.
			• maximum (adaptive mode only)—Specifies
			the jitter buffer's upper limit (80 ms), or the
			highest value to which the adaptive delay is set.
			• minimum (adaptive mode only)—Specifies
			the jitter buffer's lower limit (10 ms), or the
			lowest value to which the adaptive delay is set.
			• default—Specifies 40 ms.
		Cisco IOS Release 12.2(2)XT and 12.2(8)T

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