"divoch" <divoch@REMOVETHIShotmail.com> wrote in message
>>
>> It would have to be a seriously low bit rate not to match 32kbit/s ADPCM!
> As far as I know it is just 64kbits/s, not much more than the old dial-up.

Exactly the same as ISDN / ITU No.7.

> Is that really adequate?

Well telephone is not exactly high fidelity, but that is plenty for voice.
As the analogue loop is taken out, quality should be better and noise
significantly less than on PSTN. The only caveat is if the bandwidth is
contended then you may get latency and contnuity problems.

> divoch
>