[asterisk-dev] MFC/R2 Asterisk Channel Driver

[Steve Underwood]

Octavio Ruiz wrote:
> On Fri, Mar 28, 2008 at 7:50 PM, Caio Begotti <caio at ueberalles.net> wrote:
>   
>> On 28/03/2008, at 21:57, John Todd wrote:
>> There are at least 3 companies
>>  selling Asterisk-compatible boards with R2 done builtin, in hardware,
>>  witch has proved to be much more stable, well supported and scalable
>>  than anything else.
>>     
>
> Well, I think there is a big misconception regard those
> hardware-built-in MFC/R2  implementations.
> AFAIK all of those asterisk-compatible boards depend on software
> implementations of MFC/R2 protocol and at least one of them is GPL
> (but
> heavy dependent on their own hardware interrupts) with the main
> difference that they use a hardware DSP for the MF tone generation
> rather
> than a software based DSP like libmfcr2 does.
>   
Doing the tone detection on the card is not an issue - its such a 
lightweight process. I was told none of the locally produced cards has 
echo cancellation, though. Is that right? If so, its a huge drawback.

Steve