HP MSR2000/3000/4000 Router Series Voice Command Reference

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Syntax
echo-canceler tail-length milliseconds
undo echo-canceler tail-length
Default
The echo cancellation coverage is 128 milliseconds.
Views
FXS interface view, FXO interface view, E&M interface view
Predefined user roles
network-admin
Parameters
milliseconds: Specifies the echo cancellation coverage in milliseconds. The value range is 32, 48, 64,
80, 96, 112, and 128.
Usage guidelines
Increasing the echo cancellation coverage can effectively cancel multi-path echoes.
Examples
# Enable echo cancellation, and configure the echo cancellation coverage as 24 milliseconds on voice
interface 1/0.
<Sysname> system-view
[Sysname] subscriber-line 1/0
[Sysname-subscriber-line1/0] echo-canceler enable
[Sysname-subscriber-line1/0] echo-canceler tail-length 24
Related commands
• echo-canceler delay
• echo-canceler enable
hookoff-mode
Use hookoff-mode to configure the off-hook mode for an FXO interface.
Use undo hookoff-mode to restore the default.
Syntax
hookoff-mode { delay | immediate }
undo hookoff-mode
Default
An FXO interface operates in immediate off-hook mode.
Views
FXO interface view
Predefined user roles
network-admin