[Asterisk-Users] X100p echo guide

[From PH]

hi,

any experienced user please guide us newbies to tune echo training
intelligently.

echocancel can have values of 32,64,128,256, and echotraining=400 or 800

my test setup:     SoftFone --- * --- PSTN

from the default values of echocancel=128 and training=400, i observed that
if SoftFone is on the same LAN with * there is no problem with the echo for
me.

but when SoftFone is on the internet then echo reappears.

Questions:  are there any rule of thumb like when the latency increases, how
do i supposed to set echocancel from default of 128? is it higher 256? or go
down lower to 64,32? the same question with echotraining=400/800?

thanks,
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