Xref: utzoo unix-pc.uucp:18 comp.dcom.modems:1889 Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!ncar!oddjob!uwvax!astroatc!mag From: mag@astroatc.UUCP (Michael A. Goldsmith) Newsgroups: unix-pc.uucp,comp.dcom.modems Subject: Re: autobauding a TrailBlazer on a UNIX PC Message-ID: <1030@astroatc.UUCP> Date: 23 May 88 15:47:59 GMT References: <282@ditka.UUCP> Reply-To: mag@astroatc.UUCP (Michael A. Goldsmith) Organization: Astronautics Technology Cntr, Madison, WI Lines: 44 In article <282@ditka.UUCP> kls@ditka.UUCP (Karl Swartz) writes: > >I recently put a TrailBlazer on my 3B1 (UNIX PC) and now >I can't in a 1200 baud. I've got /etc/gettydefs set to >start with 19200, drop to 2400, then to 1200. The first >to work fine, but not 1200. > >Swapping 1200 and 2400 makes 1200 work, but then 2400 >won't work. It seems that it won't go to the third >choice, whichever it is. > >Any ideas? BTW, this is running uugetty and HDB with >3.51a system software. > It is not necesasary to auto-baud at all with the Trailblazer. You can set a register (S66=1, I believe. My manual is at home.) that locks the serial line betweeen the modem and the 3B1 at 9600 or whatever you wish to use. When a call comes in, the modem negotiates baud rates with the calling modem and then communicates with the caller at that rate. The serial line remains at the locked-in rate. The same thing happens on an outgoing call. Thus, you can set up your /usr/lib/uucp/L* files to place all calls at 9600 (or whatever) and uucp will be unaware that the actual communication is taking place at a lower rate. BTW, you can also chose (check the manual, I don't remember which register) whether to use XON/XOFF or RS-232 handshake signals for flow control. Hope this helps. Michael A. Goldsmith - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Name: Michael A. Goldsmith UUCP: ... {seismo | harvard | ihnp4} !uwvax!astroatc!mag arpa: astroatc!mag@rsch.wisc.edu usmail: 5800 Cottage Gr. Rd. ;;; Madison WI 53716 phone: 608-221-9001 X117 The options expressed above are my own and do not necessarily reflect those of my employer.