steveybar wrote:[color=blue]
> "Martin Johnson" <user@example.net> wrote in message
> news:EO-dnbNl5Ib85bjVnZ2dnUVZ_v7inZ2d@supernews.com...[color=green]
>> Christian wrote:[color=darkred]
>>>> My SPA-3000 has never crashed, but echo cancellation has always been a
>>>> bit poor (particularly at the remote caller's end), and dependent on
>>>> audio gain levels set in the poorly-documented, over-complex web GUI.
>>> Martin,
>>>
>>> Maybe you tried this already, and maybe you're already tired of trying
>>> stuff with the SPA-3000 already, but you might want to try different line
>>> impedance configurations in the SPA-configuration, this does have an
>>> effect on the echo canceller.
>>>
>>> Trying another analog phone also sometimes help, the local echo canceller
>>> (which is the one that causes the echo at the remote site) sometimes
>>> can't cope very well with specific (cheaper) phones, or a lot of phones
>>> parallel.[/color]
>> Thanks for the idea, I'll give it a go.
>>
>> In fact I have lots of different, vintage handsets running from the PABX,
>> so I'm not making life easy for myself ;-)
>>
>>
>> - Martin.[/color]
>
> The correct impedance setting for UK telephones/pabx lines is:
>
> 370+620||310nF
>
> best wishes - Steve.[/color]

Thanks.. I seem to have that already, under Regional / Miscellaneous /
FXS Port Impedance.

But, in the same config page (under /admin/advanced) I've just noticed a
box marked "More Echo Suppression: No". I will try setting this to Yes
for a bit and see what happens.

Cheers,

- Martin.