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Re: Solarus 8/9 Sparc Questions

Al Etienne al@thepal.com
Tue, 4 Mar 2003 08:11:07 -0800 (PST)

Digi makes a line of terminal servers that have this feature built in.  They are reasonably priced as well.  I use the Portserver II, but bought them some time ago, other recently offered products may be a better fit.


Mike Daigle wrote:
The only solution which I have found that gives satisfactory
results is the Nudata(TM) Non Aborting Serial Port Adaptor.  This
is a little black box that cost about $90. It has smarts onboard
and allows the BREAKs to be sent from a terminal or terminal
server port. But it monitors the DTR line, if it drops then the
box blocks all input, thus if a terminal server sends breaks at
power down they are blocked when DTR drops first. There is a
timing issue here but it seems to work, I suspect they have a
transmission delay built in to catch the fault before the BREAK is
sent but I don't know this for sure.

The beauty of it is that we can still use BREAK to halt the system
if we want. If the terminal server looses power all our Sun's
DON'T halt. It would also cover off any problems of the line being
cut and looking like a break as long as DTR is cut at the same

The only down side is the price tag.

"John R. Jackson" wrote:
Can someone tell me if Solaris 8 and 9 still goes into the boot monitor
when a break is sent across the serial line?
Yes, it does.  And what a major pain in the ass that is.

This "feature" has been discussed on this list before, but I don't recall
seeing a viable solution.

John R. Jackson, Technical Software Specialist, ITaP/RCS, jrj@purdue.edu
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