[asterisk-users] Credit Card processing machines

[Jerry Jones]

On Feb 17, 2009, at 1:20 PM, David Gibbons wrote:

> <snip>
> We will be testing the ADT connection heavily this week.  The modem
> connections to my understanding are 2400 baud.  Over G.711U and a T1 I
> don't see why this wouldn't be as solid as a POTS line, but our  
> tests will
> tell!
> </snip>
>
> We do *fax* in this way and it works like a charm. We can hit much  
> more than 2400 baud I think too.
>
> --Dave


Most alarm systems around here use bursts of dtmf - not an actual  
modem to communicate with alarm central.

Yes I have seen these have many issues with voip in the path.