lenny@icus.UUCP (Lenny Tropiano) (02/01/88)
I am considering upgrading to a faster modem (the on board modem at
1200 baud doesn't cut it anymore)... I'll like to get a 2400 baud modem,
but with the advent of 9600-19200 baud modems now, I would love to
have a full news feed at 9600+ baud in 45 minutes or less :-)
Has anyone successfully gotten the Telebit Trailblazer modems configured
to work on UNIX PC on tty000. What problems did you run into? What
configuration details were there? Do you need HDB (I'm using)? What
kind of throughput are you getting?
Thanks,
Lenny
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"Usenet the final frontier" ...{cmcl2!phri, hoptoad}!dasys1!/david@ms.uky.edu (David Herron -- Resident E-mail Hack) (02/02/88)
yes, trailblazers work ok on unix-pc's ...
I had two for testing (before ordering the 2 we've got on order)
and had one on the vax here and one on my 3b1 at home. They configured
about the same and it worked fine. I only had the one at home running
at 9600 baud rather than 19.2 kbaud 'cause the uucp didn't support
the faster speed. (I've got the stock uucp in the machine since I
haven't gone to the trouble of setting up HDB yet). Given that little
tidbit, the 8000 baud effective throughput looks pretty good.
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<---- It takes more than a good memory to have good memories.dmk@dmk3b1.UUCP (David Keaton) (02/03/88)
In article <241@icus.UUCP> lenny@icus.UUCP (Lenny Tropiano) writes: >Has anyone successfully gotten the Telebit Trailblazer modems configured >to work on UNIX PC on tty000. What problems did you run into? What >configuration details were there? Do you need HDB (I'm using)? What >kind of throughput are you getting? Yes, I have, with no problems. Just configure the Unix PC to believe that there's a 9600bps Hayes modem on tty000, and then add the following line on to the end of L-devices. DIR tty000 0 9600 Then "cu -s 9600 -l tty000" and you're ready to configure the modem. Most of the defaults are already set up the way you want them. The rest of the options should be set as follows. AT Q4 (partial quiet mode so getty won't see "CONNECT" message but dialout is still verbose) AT S51=4 (set interface speed at 9600) AT S52=1 (recognize DTR) AT S53=1 (interpret DCD and DTR properly) AT S54=1 (pass Breaks through to remote host) AT S58=2 (use hardware flow control) AT S66=1 (lock interface speed, unless you want to modify gettydefs) AT S110=1 (enable data compression) AT S111=30 (enable UUCP 'g' spoofing) AT &W (write these changes to non-volatile memory) And that's it. You're all set up. Don't forget to modify your L.sys file to always talk to the modem at 9600 if you have locked the interface speed there. It shouldn't matter which UUCP you're running. Now that you've got it working at 9600, if you want the serial interface to run at 19200 you can change L-devices, L.sys, and /etc/inittab accordingly, but you won't be able to use cu or the terminal emulator because they don't understand that speed. Also, as mentioned earlier in comp.sys.att, you will have to modify /etc/gettydefs . Just change the two occurrances of "B19200" to "EXTA" to fool it into giving you the speed you want. With the interface speed set at 19200bps, I get between 700 and 1200cps throughput depending on what machine I'm talking to, what speed its interface is running at (9600 or 19200), and how busy it is. As far as I can tell, I haven't experienced phone line noise bad enough to affect the speed. -- David Keaton dmk%dmk3b1@uunet.uu.net uunet!dmk3b1!dmk
jcs@tarkus.UUCP (John C. Sucilla) (02/04/88)
In article <241@icus.UUCP> lenny@icus.UUCP (Lenny Tropiano) writes: >I am considering upgrading to a faster modem (the on board modem at >1200 baud doesn't cut it anymore)... I'll like to get a 2400 baud modem, I had my PC6300 directly connected to my 3B1 on tty000 for awhile. This didnt last long because when I powered the 6300 down the 3B1 would panic every once in a while. Later I tried connecting my AT&T 4024 modem to tty00. This "worked" but had some weird problems of it's own, at least it never crashed the machine. The main problem I had with this was that uugetty (HDB uucp) would start talking to the modem which was in Hayes mode. Uugetty thought somebody was trying to login, this could go on for hours. I don't remember what was causing this right now but it sure was a pain in the butt. Things are running a lot better now that the modem is connected to tty001 and the Hardware Flow Control (HFC) package from the STORE! is installed. The first difference I noticed was that the DTR lamp was off until CD got asserted. On tty000, DTR was always there. There is still one problem with this configuration though, when a remote user dials in and gets blown off the machine for some reason the users shell never terminates even though CD went away. If they logoff normally uugetty launches again as expected. Oh, by the way, I don't know if HFC is available to non AT&T personnel and I hope I'm not starting another "We can't get HDB so shut up" wars. -- John "C" Sucilla {ihnp4}!tarkus!jcs Don't let reality stop you....