[VoIP] Decadic Savvy ATAs

[Jack Ryan]

Hello List,

I have just joined this list so I have some catching up to do. While I do
that, I would like to ask a question.

(Just to synchronise terminology, decadic dialling = pulse dialling = rotary
dialling = loop disconnect dialling)

 I have been looking for ATAs that accept decadic dialling and I have come
to the conclusion that there are very few and that decadic dialling is not
high on the average ATA designer's mind. While looking around I have
noticed:


   - A particular router/VoIP gateway understood decadic dialling
   - A firmware upgrade removed this capability

This leads me to believe that at least some devices have software
(firmware) control over decadic dialling. After hunting around I found that
VoIP/SIP services are provided by chips such as those made by Zarlink
Semiconductor ( http://www.legerity.com/products.php?cid=&sid=1&bpid=33).
The problem at the moment is that I don't have access to the data sheets so
I can see if decadic dialling is supported.

There is an open source community that supports an embedded Linux for
routers etc called OpenWrt. This project plus a chip that supports decadic
dialling = heritage phones on line.

Does someone in the CNET community have access to this data? Has someone
already been down this road?

Thanks

Jack