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- Path: in2.uu.net!insync!usenet
- From: bretting@insync.net (Greg Bretting)
- Newsgroups: comp.dcom.modems
- Subject: Re: Is USR going to support 42bis+ on future courier upgrades?
- Date: Mon, 25 Mar 1996 19:50:09 -0800
- Organization: - not one of my strong points, really...
- Message-ID: <4j7iai$qcc@drencrom.insync.net>
- References: <4j2fv1$8kf@nnrp1.news.primenet.com> <4j2iun$a3t@newsbf02.news.aol.com> <4j3r1f$1tc4@seminole.gate.net> <4j468j$gg1@drencrom.insync.net> <4j68or$nug@navajo.gate.net>
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-
- On 25 Mar 1996 08:57:47 -0500, dhaire@gate.net (doug haire) wrote:
-
- >Greg Bretting (bretting@insync.net) wrote:
- >: On 24 Mar 1996 10:51:11 -0500, dhaire@gate.net (doug haire) wrote:
- >:
- >: >I also ran the tests using *no* modems (null modem cable connection at
- >: >115200 connection rate). The MS-DOS to MS-DOS connection was completely
- >: >unusable with way too many errors at the receiver. The MS-DOS to linux
- >: >connection was stable and never showed an error.
- >:
- >: I don't think the errors you were seeing were the fault of MS-DOS... I've
- >: transferred hundreds of megs of data between DOS machines using LapLink and
- >: a null modem cable @115200 and have never had a problem.
- >
- >Apples and oranges.
-
- How so?
-
- >How many times have you used LapLink to transfer files from a remote
- >(in some other physical location) computer? How about never?
-
- What does _that_ have to do with anything? You said above that you were
- using a null modem cable, and if that's the case then my LapLink example is
- perfectly valid because it's essentially the same setup except for
- different application software being used.
-
- >Come back to reality... Using LapLink on a null modem connection
- >between two co-located computers is not using the standard DOS platform.
-
- What the hell are you talking about? How is using LapLink on two different
- DOS 6.20 machines over a null modem connection "not using the standard DOS
- platform"? In my case, the software in question is LapLink Pro 4.0c -
- which is a DOS-only app. This is not cutting-edge stuff, Doug - people
- have been doing this for years.
-
- >: >When the common computer software platform is capable of handling 115200
- >: >properly perhaps we can then consider the 230k UART speed.
- >:
- >: Well, DOS 6.2 is pretty common, and I know that I've been able to (almost)
- >: saturate the port at 115200 without any errors. Here's a log from one such
- >: test using QModem Pro for DOS, a Courier V.34 external, and plain 16550
- >: UART:
- >:
- >: 22:40:52 09-14-95 Online Timer Started
- >: 22:42:00 09-14-95 Download File(s). Protocol : Zmodem
- >: 22:42:01 09-14-95 ++ File 1MEGTEST.RUN
- >: 22:43:34 09-14-95 ++ End of file
- >: 22:43:34 09-14-95 ++ Chars Per Second : 11272
- >: 22:43:34 09-14-95 ++ Effective Percent : 0%
- >: 22:43:40 09-14-95 Elapsed Online 00:02:48
- >
- >Sure and I have also. In fact, I posted several articles showing this on
- >transfers between computers over phone lines and modems. That's not, of
- >course, what I was talking about here and it has little to do with my point.
-
- Then I obviously am missing your point; I interpreted it to be that you
- felt 115200 DTE rates were unworkable on DOS platforms, let alone 230,400,
- and that discussion of DTE rates > 115200 were pointless since 115200
- didn't work very well on most platforms. I then provide two examples, one
- using a null modem connection and another a dial-up session with an
- external modem, that seem to contradict what you are saying.
-
- Not only that, but I know for a fact that I can connect two modems to _one_
- DOS machine and pass data full-duplex (simultaneous send and receive of the
- same file) between the ports at 115200 without errors. This is normally
- how I run throughput testing on modems, using SoftArt's HowFast v1.65
- testing software running under DOS, on a wide variety of machines.
-
- Doug, I didn't just start doing this stuff yesterday - I know for a fact
- that MS-DOS is perfectly capable of supporting 115200 DTE rates, and I've
- demonstrated that on dozens of machines and literally hundreds of modems
- during the course of testing these things, using all sorts of software, and
- I know that it works.
-
- --
- | Greg Bretting |"The whole problem with the world is that |
- | bretting@insync.net |fools and fanatics are always so certain of|
- | --==<< >>==-- |themselves, but wiser people are so full of|
- | |doubts." - Bertrand Russell |
-
-