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000402_news@columbia.edu_Wed May 17 23:04:18 1995.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Using Z-modem within C-kermit.
Date: 17 May 1995 23:04:18 GMT
Organization: Columbia University
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References: <D8MDIC.9yL@argus.mh.nl>
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In article <D8MDIC.9yL@argus.mh.nl>, Ron Bollen <bll@argus.mh.nl> wrote:
: I hope anyone can help me with this problem.
:
: I am using a DECsystem running Ultrix as a sort of BBS. Client can call
: this system and retrieve information. Also the downloading of files
: using kermit of z-modem is possible.
:
: The modems I am using are hooked on a Netblazer (Telebit) and can be
: accessed throught an ip-address. (So the modempool can be reached via
: a telnet-session.)
:
: Now I want to transfer files using Z-modem and Kermit to the client-systems
: during the night in a batch-way.
: I can use C-kermit (190) which does this perfectly using the
: "set host Ip-address" to connect to the modempool and so on.
:
Thank you for acknowledging this in public. So few people take the trouble
to notice such things :-)
: But I want to use Z-modem filetransfer too.
: Is it possible to use Z-modem within C-kermit and how can I set it up?
: Maybe anyone knows a product that contains this functionality.
: (Connecting the modempool throught an Ip-address, making the connection
: to the customer and transfering files using the Z-modem-protocol.)
:
This is a rather strange question to appear in the Kermit newsgroup.
Why are there are so many questions of like this? "I have a very
complicated setup and Kermit works perfectly, but I want to use Zmodem..."
Kermit is good at these things because it is designed to be flexible. It is
independent of particular communications media. It has a scripting language.
It is one of the very few, if not the only, communications software programs
for UNIX that can dial a modem that is connected to a terminal server that can
only be reached by TELNET. We went to a lot of trouble to give you this
functionality.
You will also find that file transfers tend to work over such connections,
and even stranger ones than these.
In other words, Kermit is not only a robust file transfer protocol, but also
a good communications software program.
The most common reasons for people wishing to use Zmodem on the same
connection where Kermit works fine are:
. They think Zmodem will go faster. This is rarely true. Please read
our FAQ at http://www.columbia.edu/kermit/faq.txt.
. Kermit protocol, or a good version of it, is not available on the other
end.
The latter should be addressed by installing decent Kermit implementations
on BBSs and other dialup services. With the advent of Kermit Lite for DOS
and Windows and C-Kermit for OS/2, UNIX, VMS, and numerous other operating
systems, both of which are designed for easy use as "external protocols",
there is no reason not to have fast and reliable Kermit service everywhere.
For example, see the article on Kermit and BBS's in Kermit News #6:
http://www.columbia.edu/kermit/newsn6.html
- Frank