🚀 go-pugleaf

In message <164746535wnr@teapots.demon.co.uk> Michael White wrote:

> Hello all! I have a US Robotics Sportster Vi 28.8 which has voice/fax 
> and modem facilities. At the moment I use the supplied QuickLink II 
> software and it's, err...., OK... apart from at least one in three calls 
> being cut off due to some fault..

I've found QuickLink to be flakey at best - certainly not reliable
enough to be left unattended!

> I also use my modem with lots of comms. software on my Acorn A440 
> computer with RiscOS 3.1 and SCSIFs 3. I would like an alternative voice 
> /fax modem program for dos/windows and a fax and voice program for the 
> Acorn. If anyone can help, TCITP (the cheque's in the post)..
> Or maybe someone would be interested in developing one with me..

Unfortunately, the voice capabilities of the Vi can't be used on
a standard (Pre-Risc PC) Acorn. Most voice modems will sample at
either 7200Hz or 11000Hz, with 2,3 or 4 bits/sample - 7200Hz@2bits
fits nicely into 19200 "baud" - the fastest standard serial speed.

USR in their wisdom, at least on my 14K4 Vi, have limited sound
sampling to 8000Hz @ 2 bits, which is slightly more than 19200.
Perhaps this is something to do with gaining BABT approval?

It's certainly possible to write your own software if you have a
fast serial port - it's just a case of setting up the modem, and
saving the data stream. I found some helpful documentation about
the Rockwell chipset - I think from www.rockwell.com. The
filename is 288ACCOM.TXT if you want to do an archie search for
it.



Stuart.
-- 
Stuart Tyrrell                        Stuart@STDevel.demon.co.uk
Stuart Tyrrell Developments           AutoInfo@STDevel.demon.co.uk for info
Hardware/Software design & support    Info@STDevel.demon.co.uk for a human!