modems@telebit.UUCP (Modem Mail Account) (04/28/88)
Recently I've noticed a slight bug in the SCO dialer that is provided for
the Telebit TrailBlazer from the SCO Customer Support Department. This
disk contains several programs, including "cu", "uucico" and "dialTBIT"
which is a dial program to specifically work with the Telebit TrailBlazer.
If you have XENIX, and want to use the TrailBlazer or TrailBlazer Plus
modem, call SCO and ask for the "Telebit Update Disk" and they'll
send it out to you.
NOW, the fix. If you are using a TrailBlazer (NOT a TrailBlazer Plus), the
dialer may not work properly without a slight change. The dial program
tries to set S110=0 when it calls MDDIALOUT (see line 229 in dialTBIT.c
on the provided source code). This will result in an ERROR message from
the modem, since the TrailBlazer doesn't provide the option to run data
compression (this is a non-issue in the 'Plus, since compression is
standard).
Change the entry in line 229 of your source code from:
#define MDDIALOUT "ATS66=1S110=0\r"
to the new entry for the TrailBlazer:
#define MDDIALOUT "ATS66=1S110=255\r"
If you'd like, make two versions of the dialer, one for TrailBlazers (with the
above fix), and one for the TrailBlazer Plus (fix not needed).
Note that the fix will work with both modems, but MAY allow compression if
the modem at the other end has it enabled (with S110=1).
Hope this clears things up!
Regards,
================================================================================
Richard Siegel Phone: (415) 969-3800
Senior Systems Engineer UUCP: {uunet,ames,hoptoad}!telebit!rls
Telebit Corporation ARPA: telebit!rls@ames.ARPA
"When the going gets tough, the weird turn pro"...HST
================================================================================russ@motto.UUCP (Russell Crook) (10/19/88)
.
I have seen much discussion and commentary on the net regarding
the performance of Trailblazer Plus modems. Indeed, it
would appear that the net (at least the high volume sites) are
irretrievably hooked on them. This is *not* a flame; however, this
observation causes the following question...
It is said that, mouldering in another department here, there
exists an unused *original* Trailbalzer. Before I start trying to
lay my paws on it (and putting in the effort to get it net-ready), I ask:
Is it worth it? Is it fully/partially/not_at_all compatible
with Trailblazer Pluses? Is it too painful to consider using? What
character flaws does it have (especially the ones that caused the
creation of the Trailblazer Plus :-)) ? Rumour has it that this
particular unit does not establish connections (via autodial) very well,
but is solid once the connection is made. Is this typical? Is anyone
else using *original* Trailblazers?
advTHANKSance...
--
Russell Crook (UUCP: ...!uunet!mnetor!motto!russ)
Disclaimer: "...we're all mad here. I'm mad. You're mad."
"How do you know I'm mad?" said Alice.
"You must be", said the Cat, "or you wouldn't have come here."bill@iccdev.UUCP (Bill Gaines) (10/20/88)
In article <30@motto.UUCP> russ@motto.UUCP (Russell Crook) writes: >. >It is said that, mouldering in another department here, there >exists an unused *original* Trailbalzer. Before I start trying to >lay my paws on it (and putting in the effort to get it net-ready), I ask: > >Is it worth it? Is it fully/partially/not_at_all compatible >with Trailblazer Pluses? Is it too painful to consider using? What >character flaws does it have (especially the ones that caused the >creation of the Trailblazer Plus :-)) ? Rumour has it that this >particular unit does not establish connections (via autodial) very well, >but is solid once the connection is made. Is this typical? Is anyone >else using *original* Trailblazers? > The old Trailblazers are compatible with the new modems. We have four of them. Upgrading them is just too expensive for us. I tried to get one of these modems to work with UUCP as our system's primary modem. I had all kinds of problems. I could not get it to adjust baud rates properly when I tried to dial out. I had so many problems with this that I finally decided to use it as a dial in only modem. Our news feed has Trailblazers. They call us to transfer our news via UUCP. When their Trailblazer Plus calls our old Trailblazer and connects in FAST mode at 19200 baud, the UUCP transfers seem to have an effective transfer rate of only 1200 baud. This is because the old Trailblazer does not have the UUCP protocol built in like the Trailblazer Plus does. We ended up calling them with our Hayes 2400 baud modem and got a 2400 baud effective news transfer rate. The old and the new modems just do not seem to work to well together when doing UUCP transfers. The old modems are still reliable. We use them all the time to guarantee error free transmissions between a Telebit Trailblazer Plus modem in Scotland and our site. We still get the 1200 baud rate even then. -- Bill Gaines Industrial Computer Corporation
clay@claris.com (Clay A. Maeckel) (10/20/88)
In article <398@iccdev.UUCP> bill@iccdev.UUCP (Bill Gaines) writes: >... This is because the old >Trailblazer does not have the UUCP protocol built in like the >Trailblazer Plus does. The non-plus Trailblazer can support the UUCP protocol spoofing if you upgrade the ROM to version 3.01 (something like that). We have two of the older modems (one doesn't even have the word TrailBlazer on it, only Telebit) and upgraded one of them to the new ROMs for about $100US. We'll upgrade the other whenever we get another phone line. -- Clay Maeckel * UUCP: {ames,apple,portal,sun,voder}!claris!clay (I know nothing!) * Internet: clay@claris.com * GEnie: C.MAECKEL Claris Corporation * AppleLink: Maeckel1 * CompuServe: 73057,255
rls@telebit.UUCP (Richard Siegel) (10/20/88)
In article <30@motto.UUCP>, russ@motto.UUCP (Russell Crook) writes: > . [a bunch of stuff about TrailBlazer and TrailBlazer Plus differences deleted] > Is it worth it? Is it fully/partially/not_at_all compatible > with Trailblazer Pluses? Is it too painful to consider using? What > character flaws does it have (especially the ones that caused the > creation of the Trailblazer Plus :-)) ? Rumour has it that this > particular unit does not establish connections (via autodial) very well, > but is solid once the connection is made. Is this typical? Is anyone With regard to TrailBlazers (not-Pluses), yes they will work fine with all existing TrailBlazer Plus modems, with a couple of exceptions. 1. The TrailBlazer does not provide the Micro-Packets which gives faster interactive response in the TrailBlazer Plus. For UUCP this is a non-issue. For ordinary use, it is somewhat annoying, but tolerable. 2. The TrailBlazer plus does not have data compression. Again, with compressed news in a standard feed, this too is a non-issue. If the original TrailBlazer has firmware less than revision AA3.01, please call our 800-TELEBIT number, and order an upgrade kit, part number RA12X-UK3, to add the protocol support, and fix a number of bugs. It costs $124. I would not recommend using the TrailBlazer without it, especially if your firmware is less than rev AA3.00. Hope this helps you out. You definitely don't have a piece of obsolete equipment so give it a try. Our technical support number is (415) 969-2500. Regards, ========================================================================== Richard Siegel Phone: (415) 969-3800 Product Manager UUCP: {sun,uunet,ames,hoptoad}!telebit!rls Telebit Corporation ARPA: telebit!rls@ames.ARPA "We are, after all, professionals"...HST ==========================================================================
dvv@hq.demos.su (Dmitry V. Volodin) (09/04/90)
Does anybody knows how to buy Telebit Trailblazers in Europe? Dima <dvv@hq.demos.su> or <dvv%hq.demos.su@fuug.fi>