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- Newsgroups: comp.unix.aix
- Path: sparky!uunet!boulder!jove.Colorado.EDU!cary
- From: cary@jove.Colorado.EDU (John R. Cary)
- Subject: Dialin to v.32bis modem on RS6000/220 crashes system
- Message-ID: <1992Sep8.011808.24684@colorado.edu>
- Sender: news@colorado.edu (The Daily Planet)
- Nntp-Posting-Host: jove.colorado.edu
- Organization: University of Colorado, Boulder
- Date: Tue, 8 Sep 1992 01:18:08 GMT
- Lines: 58
-
- I am trying to connect to an RS6000/220 running stand alone (not
- diskless) with AIX3.2 via modem. I follow the procedure below. This
- procedure worked without a problem on an RS6000/320. The modem is
- a Twincom14,400 data+fax. Are there problems
- with serial ports on the 220?
-
- Procedure to install high-speed modem on AIX3.2
-
- 1. Define tty via
- smit tty
- Change / Show Characteristics of a TTY
- set:
- Enable LOGIN disable
- BAUD rate 38400
- ...
- XON-XOFF handshaking no
- TERMINAL type vt100
- and added "dtropen,rts" to STTY attributes for RUN TIME and LOGIN
-
- 2. Configure tty via
- smit tty
- Configure a Defined TTY
-
- 3. Add rts to the control stack via:
- chdev -l tty0 -a login='disable' \
- -a logmodes='hupcl,cread,echoe,cs8,ixon,ixoff,clocal' \
- -a runmodes='hupcl,cread,brkint,icrnl,opost,tab3,onlcr,isig,icanon,echo,echoe,echok,echoctl,echoke,imaxbel,iexten,clocal'
- stty add rts </dev/tty0
- chdev -l tty0 -a login='disable' \
- -a logmodes='hupcl,cread,echoe,cs8,ixon,ixoff' \
- -a runmodes='hupcl,cread,brkint,icrnl,opost,tab3,onlcr,isig,icanon,echo,echoe,echok,echoctl,echoke,imaxbel,iexten'
-
- 4. Configure modem via kermit. I set the modem to use v.42bis and specify
- rts/cts control. (at&fe1l1w1&c1&d2&q5).
-
-
- After this I am able to dial out to another unix machine. But if I log in
- from my Mac at home, I get garbage characters, and then the 220 freezes.
- It is time to hit the small orange button.
-
- One possibility seems to be that my home mac has a port speed of 57600.
- With full compression it is conceiveable that the RS6000 is receiving
- characters at a speed much greater than it should. I do not want to
- use xon/xoff flow control, because I will be using SLIP over this line
- eventually. Still, this would be a mystery, because when I have used
- an RS6000/320 instead, I get no problems.
-
- BTW, even though through smit I specify that the tty should not use
- xon/xoff, "stty get </dev/tty0" gives back
- "xon" as one of its characteristics. What does this mean?
-
-
- --
- --------------------------
- John R. Cary cary@boulder.colorado.edu
- Department of Astrophysical, Planetary and Atmospheric Sciences
- University of Colorado, Boulder, CO 80309-0391
- ph. (303) 492-1489 fax (303) 492-0642
-