[asterisk-biz] hdwr v. sftwr v. no echo cancellation

[Chris Langford]

f>Matt 
wrote:

>> 
DEFINITELY 
use 
hardware 
echo 
canc... 
otherwise 
you 
may 
be 
upset 
with 

>> 
the 
quality 
of 
some 
calls.



Actually, 
I 
would 
agree 
with 
you 
most 
of 
the 
time, 
but 
for 
8 
or 
less 
channels 
that 
you 
will 
be 
using 
with 
Digium's 
TDM800P 
either 
choice 
would 
work. 
The 
main 
consideration 
is 
the 
amount 
of 
CPU 
power 
that 
your 
system 
has. 
The 
hardware 
echo 
cancellation 
module 
and 
the 
HPEC 
(High 
Performance 
Echo 
Cancellation) 
software 
use 
the 
same 
algorithm. 
Either 
way 
you 
will 
be 
using 
the 
same 
AT&T 
certified, 
toll-quality, 
G.168 
compliant 
echo 
canceller. 
The 
main 
reason 
to 
use 
the 
VPMADT032 
h/w 
based 
solution 
is 
because 
it 
is 
immune 
from 
any 
system 
CPU 
spikes 
that 
might 
otherwise 
affect 
a 
software-based 
solution.








  
  
  
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