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000081_news@watsun.cc.columbia.edu _Sat May 22 15:22:15 1999.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Subject: Re: Carrier Detect problems
Date: 22 May 1999 19:04:29 GMT
Organization: Columbia University
Message-ID: <7i6v3t$1rf$1@newsmaster.cc.columbia.edu>
To: kermit.misc@watsun.cc.columbia.edu
In article <3746effd.1268253@news.zip.com.au>,
Graham Smith <gqs@zip.com.au> wrote:
: I have just set up CKermit 7 Beta 6 on SuSE 6.1 Linux and am having
: problems with the Carrier detection.
:
: I am using a V34 modem...
:
Make and model?
: ... to dial a number of sites.
:
How are you dialing? With Kermit's DIAL command? Did you give a SET MODEM
TYPE command prior to the SET LINE command?
: If I dial another
: V34 modem I do not have any problems but if I call a 2400 baud modem
: the modem sends "CARRIER 2400" after the handshake tahes place.
: At this stage the CD lead is still low. Kermit appears to now check
: the CD lead and still being low issues a statemet saying that I have
: lost carrier.
:
: About 2 to 5 seconds latter the modem sets the CD lead high.
:
Of course the modem should set CD high at the same time it prints the
CONNECT message.
If you are using C-Kermit's DIAL command, opens the device in the "don't
require carrier" mode so it can send AT commands to the modem. After it
gets the modem's CONNECT message (word or numeric result code) it changes
the device to "require carrier" mode. If your modem really delays 2-5
seconds before turning on CD, then your script can PAUSE 5 seconds (more
or less) before trying to do any i/o on the connection.
Or you can use SET MODEM TYPE UNKNOWN, which ignores all messages from
the modem and just waits for CD to come on. See the manual for details.
: If I run this as a script the modem is disconnected before the CD lead
: has been set high. It does not matter if I set CARRIER-WATCH OFF, the
: modem still disconnects.
:
: The script was working perfectly under Solaris X86 using CKermit
: 6.0.192 using the same modems.
:
: Any ideas as to what is going on?
:
If the above suggestions didn't help, please send a copy of your script to
kermit-support@columbia.edu and we'll take a look at it.
- Frank