R0106-HP MSR Router Series Voice Configuration Guide(V7)

20
Step Command Remarks
4. Configure the echo
cancellation delay.
echo-canceler delay milliseconds The default is 0 milliseconds.
5. Configure the echo
cancellation coverage.
echo-canceler tail-length
milliseconds
The default is 128 milliseconds.
For routers installed with the
interface module SIC VE1 or SIC
VT1, the value range is 32, 48,
64, 80, 96, 112, and 128. For
routers installed with any other
interface module type, the value
can only be 128.
Adjusting echo cancellation parameters
Table 1 describes how to adjust echo cancellation parameters for different symptoms.
Table 1 Adjusting echo cancellation parameters
S
y
m
p
tom Parameters ad
j
usted
A user hears echoes or loud background noises
from the peer when speaking.
Speed up the convergence of comfortable noise
amplitudes.
There are loud environment noises. Increase the maximum amplitude of comfortable noises.
A user hears echoes when speaking.
Enlarge the mixture proportion control factor of
comfortable noises.
There are echoes when both parties speak at the
same time.
Enlarge the two-way judgment threshold.
To adjust echo cancellation parameters:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Adjust echo cancellation
parameters.
echo-canceler { convergence-rate
value | max-amplitude value |
mix-proportion-ratio value |
talk-threshold value }
By default:
• The convergence rate of
comfort noise amplitude is 0.
• The maximum amplitude of
comfort noise is 256.
• The comfort noise mixture
proportion control factor is
100.
• The two-way judgment
threshold is 1.
The echo-canceler enable
command must be configured for
the configured parameters to take
effect.