W8SDZ%MIT-MC@sri-unix.UUCP (07/18/83)
From: Keith Petersen <W8SDZ @ MIT-MC>
The PMMI MM-212, The 300/1200 S-100 Modem
A preview by Mark Pulver - AIMS
(312) 789-0499 - 24hrs - PMMI
07-14-83
Well, starting at the end of August, PMMI will start to ship
their new S-100 modem that a lot of us have been waiting for. As
taken from PMMI's brochure, here is some of what we can expect.
o Baud Rates are 45.5-300 and 1200 baud
o 1200 baud is Async or Bisync
o A very full featured control ROM, resulting in a very
intellegent modem
o Modem is controlled through single ASCII characters
D - Dialing string follows, 32 characters max.
B - Blind dial, ( 5 second pause )
T - Touch tone the following numbers
P - Pulse dial the following numbers
K - Wait for another dial tone
R - Redial last number entered
M - Display dialer memory, with command codes
H - Originate calls in 212 mode
L - Originate calls in 103 mode
O - Force modem into originate mode
A - Force modem into answer mode
Q - Hang up phone
SR - Software reset defaults
Cxxxx - Change options table
o Modem will dial all 16 touch tones
0-9, *, #, and A-D
o Modem reports progress by single ASCII characters
D - Dial tone detected
R - Remote end ringing
B - Remote end busy, (terminates call)
V - Voice detection! (terminates call)
F - Failed call
T - Time out
I - Invald command
M - Dialer memory overflow
N - No dial tone
E - Exiting command mode, starting comm mode
L - 103 carrier detect
H - 212 carrier detect
Ring detect also by DSR status
o Options list, All modifiable, * indicates default
*A - Set asynchronous mode
B - Set bisynchronous mode
D - Answer only 212 modems
*E - Answer 212 or 103 modems
F-I - Set character length of 8-11 bits
H, 10 bits, is the defualt
*J - Enable loss of carrier disconnect
K - Disable loss of carriewr disconnect
*L - Enable receive space disconnect
M - Disable receive space disconnect
N - Enable send space disconnect
*O - Disable send space disconnect
*P - Enable timeout disconnect on answer
Q - Disable timeout disconnect on answer
*R - Enable respond to remote test
S - Disable respond to remote test
T - Enable analog loopback busy out of line
*U - Disable analog loopback busy out of line
V - Enable command mode echo
*W - Disable command mode echo
*X - Enable call progress detection
Y - Disable call progress detection
Z - Fail call timer = no time out
*a - 30 seconds
b - 60 seconds
c-k - Retry call 1-9 times respectively
*l - No call retry
*m - Enable voice detection
n - Disable voice detection
o/p - Enable/Disable data available interrupt
q/r - Enable/Disable transmitter empty int.
s/t - Enable/Disable ring detect interrupt
All interrupts default to disabled
o As the MM-103, the modem requires 4 contiguous ports
o Deliveries are due to start late August
o Orders are being taken now
From a reference in the brochure, as well as being able to
read the name off of the chip in the cover photo, it looks as
though Racal-Vadic had a bit to do with the developement of the
MM-212, nothing wrong with that. I only wish that they had
somehow been able to keep the programability of the MM-103.
I myself plan to try the approach of leaving both modems in
the system, and online. The MM-212 will do all of the answering,
if a Bell 103 carrier is detected,( modem sends an "L" ), then I
plan to switch over to the MM-103, and go through the normal baud
checking that most of us are used to. Otherwise, the MM-212 will
handle the call entirely. Now, my first impression of that crazed
thought is that there will be a lot of code laying around, but
seeing how the 212 seems to be dream to control versus the Hayes
300/1200, I'll sacrifice a few nights and weekends of work, and
trade 1/2K or so of code to do it! The flexibility will be
enormous for us S-100 users...
I hope this has shed some light on what PMMI is doing these
days. By the way, the suggested retail is $695.95, not bad
considering what it would cost those of us without an open serial
port to add a quad board plus an external modem. And you still
might not be able to get all of the features.
--end--