From: Mark Hittinger <bugs@netsys.com>
Date: Sun, 13 Mar 94 20:12:06 PST
To: cypherpunks@toad.com
Subject: re: voice encryption/isdn
Message-ID: <199403140415.AA05313@netsys.com>
MIME-Version: 1.0
Content-Type: text




>> [IBM ISDN board with TI DSP, COM1 interface, 64kbps]

>The big problem with ISDN is still getting connectivity to the
>people you want to talk to and getting service at reasonable prices

Yep.  But it may be there some day.  Ken Olson called ISDN a joke.
I remember seeing somebody in Computer World saying ISDN stood for

"I Still Don't kNow".

>Do you know if the TI DSP is user-programmable, or if it's just
>performing most of the ISDN functions?

Hah!  We are talking about an IBM board here!! :-)   There was some
kind of ROM on the board, it may be an 8051 with EPROM?  Or possibly
a 68701.  We will figure it out at some point.

Speaking of DSP the new AT&T 3700 modem (from paradyne actually) has
a DSP and it seems to be driven by an easily modifyable rom.  Just another
possibility.


While we are blue skying about this - what about the idea of using two
cellular connections in parallel?  Aside from cost it might create some
interesting interception problems.
---------
I'd like a 250 Mhz 128 bit hybrid processor with 64 meg of 8 way interleaved
memory, a 10 megabyte per second i/o channel, two 3 gig hard disks, two dat
drives with compression, and a large diet coke.
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