🚀 go-pugleaf

In article <1992Sep14.160729.16161@med.umich.edu>, warlock@med.umich.edu (Brad Robertson) writes:
> 
> (I'm posting this for a friend who doesn't have access to USENET.)
> 
> We would like to connect a modem to a DECstation 3100.  The manual says that
> "auto-answer" is not available since only data lines are connected.   Actually
> we are not  interested in dialing *out* but in dialing *in* (people  doing work
> from home computers, etc).  So this may be a problem.  Is there any way around
> this problem?
> -- 

You can set up most modems so that they handle auto-answer themselves,
just tie the DTR line always high.

I've not used 3100s (or Ultrix), but based on VAX/VMS experience, the problem
with having only the data lines connected (and the tty port thus configured
as a local, non-modem line), is that the system will not respond
if the modem loses the connection, i.e. due to line noise, so anyone else
dialling in on that line can pick up someone else's session. Its a security
problem rather than a technical one. Barring root logins on such lines,
and having some sort of idle-process killer might work if you don't
have high-security requirements.

Steve


-- 
Steve McKinty
SUN Microsystems ICNC
38240 Meylan, France
email: smckinty@france.sun.com	   BIX: smckinty