Samsung Ubigate iBG3026, Руководство по настройке

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Ubigate iBG3026 Configuration Guide/Ed.00
© SAMSUNG Electronics Co., Ltd.
505
The presence of echo occurs whenever the replicated signal delay exceeds 10
msecs, and becomes apparent to the speaker as reflected voice when the delay
exceeds as little as 16 msec. It is manifested to the far end as an altered replica
of the speaker original. If the echo interval exceeds approximately 25
milliseconds, it is distracting. In order to combat the echo phenomenon, an
echo cancellor is employed.
Figure 31.6 Echo problem
Step Command Purpose
1 configure terminal Enter the global configuration mode.
2 voice-port slot/sub-
slot/port:ds0-group-no
Enter the module configuration mode.
3 echo-cancel enable Enables the echo cancellation on this voice port.
Echo cancellation works on the echo
cancellation coverage which is configured by
user or as default.
4 echo-cancel coverage
{ 8 | 16 | … | 128 } Choose the echo tail length(echo cancel
coverage) to which echo cancellor is committed.
5 non-linear Enables nonlinear processing(residual echo
suppression) in the echo canceler.
6 exit Exit the voice-port configuration mode.
7 show voice port
slot/sub-slot/port:ds0-
group-no
checks out if the values set up in the voice
port are set up normally.
San Francisco
Caller
Philadelphia
PSTN
Clear speech Send
Receiver
Clear speech
E
C E
C