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Подскажите, есть ли решение, как убрать эхо при звонке через FXO?
Спасибо!

AP200# show voice port 0/0
Voice port slot(0)/port(0)
line type = FXO
status = Idle
input gain = 0 db
output gain = 0 db
polarity inverse = disabled
number of rings to answer = 1
ring detect timeout = 7000 msec
ring detect timer = 300 msec
FXO hookflash out = 300 msec
clear down delay = 0 sec
clear down tone detect = enabled
tie connection = plar 21
description =
translate incoming called-number = 10
translate incoming calling-number = 10
comfort noise generation = enabled
dial tone generation = enabled
echo cancellation = enabled
announcement = enabled
low dtmf gain = -8
high dtmf gain = -5
caller ID = disabled
caller ID type = bellcore
caller ID NAME = enabled
DID Type = normal
busyout action = none
backup busyout action = none
current callnumber = -1
holded callnumber = -1

Попробуйте изменять настройки
conf t
voice-p x/x
input gain <значение>
output gain <значение>

Спасибо! Помогло!!!
Покрутил усиление, уменьшил input gain на -5, а output прибавил, теперь и слышно хорошо и эхо пропало...