Date   : Thu, 21 Jul 1983 2026-:00PDT
From   : Bruce L. Conroy <BLC@jpl-vax>
Subject: U.S Robotics Password Modem

I have been using the U.S. Robotics Password ($380 from the 
Bottom Line) for about 2 weeks. 
 
1)     Although I don't know how smart the Hayes unit is, the 
Password has a number of options, all programmed by sending 
ASCII strings to the modem. 

       a)      Number of times to let the phone ring before 
               answering. 
       b)      Tone or pulse dialing. 
       c)      Time to wait after dialing for carrier. 
       d)      Time to leave the monitoring spekaker on
               (default is from time dial command is given
               until carrier is established.)
       e)      force answer mode (can also be set with DIP switch.)
       f)      Local echo (also known as half duplex.)

2)     There are several other options, which don't seem very
important.

3)     Once carrier is established, the onlyhing the modem will
respond to is a one second pause followed by +++ followed by
another one second pause. Four pluses are ignored. (the +
character can also be programmed to any other character.)

4)     The unit seems to run hot. Only time will tell if
this is a problem or not.

               Bruce Conroy (BLC@JPL-VAX)