On Thu, 2 Aug 2012, Tony Duell wrote:
There very
well may have been some confusion as to whether or not they
could legally disclose the technical details of the modem. Which chipset
did the modem use?
The 2400 bps [1] part is the Rockewell chipset, along with amn AM7910
for the slwoer speeds (things liek V21, V23). I forget what the
microcontroller is.
Ah, that's probably why then. A 2400 baud modem would have been V.22bis
and Rockwell was really pushing their V.22bis stuff back then. Amstard no
doubt signed a non-disclosure agreement with Rockwell when they obtained
the datasheets and sample implementation drawings for the Rockwell
chipset. It wouldn't surprise me at all if the modem design had been very
closely based on the sample implementation from Rockwell.