R0106-HP MSR Router Series Voice Command Reference(V7)

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Use undo echo-canceler tail-length to restore the default.
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. For routers installed with the
interface module SIC VE1 or SIC VT1, the value range is 32, 48, 64, 80, 96, 112, a n d 128 . Fo r ro u t e rs
installed with any other interface module type, the value can only be 128.
Usage guidelines
Increasing the echo cancellation coverage can effectively cancel multipath echoes.
Examples
# Enable echo cancellation, and configure the echo cancellation coverage as 32 milliseconds on FXS
interface 2/1/1.
<Sysname> system-view
[Sysname] subscriber-line 2/1/1
[Sysname-subscriber-line2/1/1] echo-canceler enable
[Sysname-subscriber-line2/1/1] echo-canceler tail-length 128
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