Re: OPA0 Console connection

On Mon, 13 Mar 2006 17:42:41 GMT, Hoff Hoffman <hoff@xxxxxxxxx> wrote:

The OpenVMS Frequently Asked Questions (FAQ) section "How can I prevent
a serial terminal line from initiating a login?" might be of some
interest, here. And maybe "Using REPLY/LOG from DCL? Disabling Console
OPCOMs?", depending on what's initiating the chatter on the line.

Well I removed one end of the cable from the 7.3-1 and attached it to another
node running 7.3-2 and don't see this behaviour, from which I conclude that the
other node is "chattering" as you put it. In the FAQ your remedy is

In SYSTARTUP_VMS.COM, issue the command:

$ SET TERMINAL/NOTYPEAHEAD/PERMANENT ddcu:

Does imply a reboot is required? SHOW TERM DDCU: reveals no such device.
Can OPA0 be used instead of DDCU?

BTW, why is it on some nodes OPA0 and on others TTA0?

Oh, and a BREAK signal -- a serial line framing error -- or a [CTRL/P]
in the data stream, depending on the box -- can halt the configuration.
See "Why does my system halt when I power-cycle the console terminal?"
for related.

Yes this did indeed happen over night, and required a powerdown, as even SRM was
in an odd state, it didn't recognize any commands including init.
.