Cisco Systems (VISM) Configuring ECAN

4-29

Cisco VISM Installation and Configuration Guide

Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004

Chapter4 Configuring VISM Features

Configuring VISM Features

•5 = Local MIB, LCO list, remote SDP data list

•6 = Local MIB, remote SDP data list, LCO list

You have completed assigning and configuring the co dec template . Proceed to the “Configuring ECAN”

section on page 4-29.

Configuring ECAN

Complete the following steps to enable and configure echo cancellation (ECAN) on a line-by-line basis:

Step 1 Type the cnfecanenable command, line-num and ecan-enable argument values, and press Enter to

enable (or disable) ECAN for a line. Specify the arguments with the following values:

•line-num: In the range from 1 to 8.

•ecan-enable:

–

1 = Disable

–

2 = Enable

Step 2 Type the cnfecanrec command, line-num and res-echo-control argument values, and press Enter to set

the residual echo control. Specify the arguments with the following values:

•line-num: Type the value used in Step 1.

•res-echo-control:

–

1 = Cancel only

–

2 = Suppress residual

–

4 = Comfort noise

Step 3 Type the cnfecantail command, line-num and max-ecan-tail argument values, and press Enter to specify

the ECAN algorithm’s maximum tail length. Specify the arguments with the following values:

•line-num: Type the value used in Step 1.

•max-ecan-tail (defined in milliseconds):

–

112

–

128