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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
Chapter 5 CLI Commands
cnfecantail
cnfecantail
To configure the maximum tail length for digital signal processors (DSPs) on a VISM card that is used
for echo cancellation, use the cnfecantail command in the VoIP switching/trunking, switched AAL2
PVC, and AAL2 trunking operating modes.
cnfecantail line-num max-ecan-tail
Syntax Description
Command Modes VoIP switching/trunking, switched AAL2 PVC, and AAL2 trunking
Usage Guidelines This command applies to DSPs processing data on a specified line.
Examples The following example shows that line 3 of the current VISM card is configured with a maximum ECAN
tail length of 96 ms:
cnfecantail 3 96
Related Commands
line-num Line number to configure maximum ECAN tail length; in the range from 1 to 8.
max-ecan-tail Maximum tail length (defined in milliseconds). It can be one of the following
values:
• 24
• 32 (Default)
• 48
• 64
• 80
• 96
• 112
• 128
Command Description
cnfecanenable Enables or disables ECAN on a specified VISM card line.
cnfecanrec Configures the residual echo control for DSPs on a VISM card that is used for
ECAN.
dsplndsp Displays the DSP information for a specified VISM card line.