[Asterisk-Users] SPA-2000, call for help testing echo issues...

[Mike Benoit]

In my hunt to track down my echo issues, I tried disabling all echo
cancellation, suppression, adaption, on my SPA-2000 (Advanced section of
the config, under Line 1/2). Then calling from one local extension to
another. (SPA-2000 Line1, to Line2 on the same device)

I was pretty shocked with the results, the echo was HORRIBLE! I even
tried 3 different analog phones. 

Now, once I turned the echo cancellation back on, I tried a few tests to
see if I could hear any echo. The test was saying: "test", "check", and
hitting my desk with a single finger fairly hard. 

When I would say "test" and "check" I would try all sorts of different
voice tones, volumes, etc... I found I could still hear echo when doing
this. When I hit the table with my finger (while still holding the phone
to my ear and not talking of course), you could _really_ notice the
echo. I could hear the "hit" perfectly clear coming back through the
phone. 

As well if you change the Input/Output gains under the Regional section,
cranking them both up to 5 or so, you could easily hear the echo, and
the SPA-2000's poor attempts to cancel it. 

I'm curious to know if anyone else using SPA-2000's have the same
issues. I wonder if when calls are made from SPA-2000's to PSTN numbers
through Asterisk, asterisk is just amplifying the SPA-2000's own echo
somehow. 

Any test results are welcome, I would be very interested if other people
are unable to replicate my results. 

-- 
Mike Benoit <ipso at snappymail.ca>