From: utzoo!decvax!cca!CSTROM@Mit-Mc@sri-unix
Newsgroups: net.micro
Title: PMMI modem
Article-I.D.: sri-unix.2783
Posted: Thu Aug 19 13:08:19 1982
Received: Fri Aug 20 04:20:48 1982

From: Charlie Strom 
It is my understanding that the Hayes Smartmodem will easily runn at
450 baud, but not at 600. The Racal-Vadic 3451's (and presumably the
rest of the R-V 103 protocol modems) will also run up to 600 baud.
Note that this is second hand information, but I consider it reliable.