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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter5 CLI Commands
cnfcodecjtrdelay
cnfcodecjtrdelay
To configure the jitter delay mode and initial delay value for a specified codec , use the cnfcodecjtrdelay
command in the VoIP switching/trunking, switched AAL2 PVC, and AAL2 trunking operating modes.
cnfcodecjtrdelay codec-type jitter-mode jitter-delay
Syntax Description
Command Modes VoIP switching/trunking, switched AAL2 PVC, and AAL2 trunking
Usage Guidelines Cisco recommends that you configure the jitter-delay argument to 20 ms when using DSP firmware
versions 3.4 and 3.6.
The G.723.1 codecs are supported for VISM-PR cards and are not supported for VISM cards.
codec-type Type of coding/decoding to be performed on the data stream. It can be one of the
following values:
•1 = G.711u
•2 = G.711a
•3 = G.726-32k
•4 = G.729a
•5 = G.729ab
•6 = Clear channel (VAD must be off)
•7 = G.726-16k
•8 = G.726-24k
•9 = G.726-40k
•11 = G.723.1-H
•12 = G.723.1a-H
•13 = G.723.1-L
•14 = G.723.1a-L
jitter-mode Jitter delay mode. It can be one of the following values:
•1 = Fixed. Cisco recommends fixed mode if latency jitter is constant.
•2 = Adaptive. Cisco recommends adaptive if latency jitter is variable.
jitter-delay Initial jitter delay (defined in milliseconds). It can be a value from one of the
following ranges:
•For codec templates 1, 3, and 4, in the range from 0 to 10 0 in in cre ment s of 10 .
•For codec template 2, in the range from 0 to 100 in increments of 5.