Dear Sacha:
I'm also using this device, Sipura SPA-3000. However, with my
experiance, I do have echo issues. What are your echo cancellation
related settings in Asterisk and also in the SPA device?
For example, when off-hook and connected to a call that goes from SPA
Line-1 thru Asterisk and thru SPA PSTN Line; say the opposite line is
quiet. What I hear if I snap my fingers is the echoing 'snap' in
1/4-1/2 second delay. Also, when talking with people, the audio gets
garbled in my ear if we happen to talk over one another. The person on
the other end does not seem to experiance this.
What have I got set wrong?
Kevin
sacha panasuik wrote:
I had been using a generic x100p card for a few months with mixed
results - echo was a problem, though tweaking the rx/tx gain settings
and recompiling asterisk with alternate echo detection algorithms did
help some. I recently purchased a Sipura spa-3000 and reworked
asterisk to use it instead and have been very happy with the results -
though, like yourself it was budget concerns that held me back for a
while. The clarity is noticeably better using the spa-3000 and echo
is not a problem at all. The only issue is I had to add a delay from
answering the pots line before passing the call to asterisk so that
Caller ID information is passed along, only a minor inconvenience.
As for tweaking for the background noise, I wouldn't be surprised if
you could improve things by adjusting the echo cancellation settings
in zapata.conf. Perhaps toggling the echocancelwhenbridged parameter
from yes to no or no to yes and see it improves.
--
sacha
