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- Newsgroups: comp.sys.sun.admin
- Path: sparky!uunet!nih-csl.dcrt.nih.gov!yog-sothoth.dcrt.nih.gov!jwa
- From: jwa@yog-sothoth.dcrt.nih.gov (James W. Adams)
- Subject: Re: dial-in modem setup
- Message-ID: <1992Dec30.233149.14056@alw.nih.gov>
- Sender: postman@alw.nih.gov (AMDS Postmaster)
- Organization: National Institutes of Health, Bethesda, MD
- References: <1992Dec23.161954.15618@w8hd.org> <1992Dec28.182240.28392@alw.nih.gov> <1992Dec28.230204.4084@w8hd.org>
- Distribution: na
- Date: Wed, 30 Dec 1992 23:31:49 GMT
- Lines: 60
-
- In article <1992Dec28.230204.4084@w8hd.org> kimc@w8hd.org (Kim Culhan) writes:
- >jwa@yog-sothoth.dcrt.nih.gov (James W. Adams) writes:
- >
- >>Read the zs man page. It tells you how to configure the port to dial
- >>out without CD asserted using a device with minor number 128 greater
- >>than the corresponding /dev/tty*
- >
- >This *is* the way I have the port configured.
- >The port will dial out fine but if you don't do as I described, you
- >can't see what the modem returns on the console whn running the
- >tip program.
-
- No, all you have to do is avoid setting RTS/CTS flow control on until
- after you establish a connection. The combination of low DCD with
- clocal unset *and* crtscts set turns off the 8530's receiver. It's of
- somewhat dubious value to turn it on at all on current Suns, since the
- chief problem is the modem over-running the Sun's serial port. Crtscts
- does not throttle input.
-
- >I know it will work. Thats why I posted the info on how to do this.
- >Also, you don't need to disable echo and result codes :)
- >
- Possibly... on most systems echo and result codes enabled before opening
- and locking the device for output will cause race conditions with getty.
-
- >>You can then set the modem so CD follows carrier. The built-in locking
- >>will prevent getty from opening the corresponding /dev/tty* device when
- >>CD goes high on outgoing data calls.
- >
- >My description included a scheme for setting the modem which involves
- >initializing it to allow CD to follow carrier. Whats locking got to do
- >with this?
-
- If the device were not locked, getty could open the incoming device
- (ttya or ttyd0) when DCD goes high.
-
- >-Did you read my post?
-
- Yes.
- >
- >>You can put an initialization string in applications such as Kermit that
- >>use result codes in order to reset echo and result codes if needed.
- >
- >Huh?
-
- Same function as cm in /etc/remote.
-
- It appears that both methods will work on Sun systems.
-
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-
- --
- James W. Adams -- NIH Scientific Computing Resource Center
- Building 12A, Room 1050 phone: (301) 402-4154
- National Institutes of Health uucp: uunet!nih-csl!jwa
- Bethesda, MD 20892 Internet: jwa@alw.nih.gov
-