Kermit slow?

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From - Sat May 22 06:22:38 1999
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.unix.sco.misc
Subject: Re: Serial File Tranfer on 3.2r4.2
Date: 22 May 1999 00:43:27 GMT
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In article <3745D2FA.5BDC79EF@home.com>, bob  <ruptured-duck@home.com> wrote:
: ... I grabbed the kermit binary for 3.2r4.2 and
: it seems to work ok. Monday will be the acid test with the two machines.
: It will be slow but my guess is it'll start to get the job done while I
: figure out UUCP!
: 
Why do you think it will be slow?  Please visit:

  http://www.columbia.edu/kermit/kermit.html

to clear up this unfortunate but apparently still widespread misconception.
Short story: In file transfer protocols, there is a tradeoff between speed
and robustness.  Kermit was tuned for robustness by default on the mistaken
impression that people would appreciate it more if it tended to work out
of the box.  Then if they wanted to see how fast it would go, they would give
it a command like "fast".  C-Kermit 7.0:

  http://www.columbia.edu/kermit/ck70.html

(which, I hope, is the one you picked up) no longer has this default tuning,
since in the real world, people tend to read documentation only when something
doesn't work at all, rather than when it works slowly.

In any case, if you have any trouble with Kermit, you can send email to:

  kermit-support@columbia.edu

to get help and you can visit the website:

  http://www.columbia.edu/kermit/

to read the FAQ, etc, and you can also read and post to the newsgroup:

  comp.protocols.kermit.misc

: One more query: in testing kermit between those two computers just
: mentioned I was able to up the speed on the Linux port to 19200: just
: edit inittab and issue the command 'init q'.
:
You don't need to edit external files in order to use Kermit -- this sets it
off from most other UNIX-based communication software.  However, you *do*
need to install it with needed user, group, and permissions to access the
dialout device and lockfile -- the same as cu and friends.

In Linux, C-Kermit 7.0 supports speeds up to 460800 bps.  I don't have an SCO
3.2v4.2 system handy at the moment, but it should allow any speed up to 38400,
maybe 57600 ("set speed ?" will tell you).  Unfortunately, I don't think SCO
3.2v4.2 supports hardware flow control so you'll have trouble with high-speed
null-modem transfers from Linux to SCO, but it shouldn't be to bad in the
other direction.

Of course, the common cautions about misconfigured PCs (interrupt conflicts,
etc) and unbuffered UARTs apply.

- Frank

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