GUBBINS@RADC-TOPS20.ARPA (04/16/84)
From: Gern <GUBBINS@RADC-TOPS20.ARPA>
I have, several times over the years, have had the terminals and 1200
baud modems I happen to be using at the time (never a hayes, usually
AJ 1259 and other govrnmt equipment) suddenly GO WEST, without warning,
or provoking the event, filling my screen with UUUUUUUs, each and
every time, which loses the host (TAC or a MULTICS), but maintains
the carriers. The last time ('bout a month ago), I had our people
check it out on the spot to no avail. The conclusion is line-glitch,
cosmic rays, demons, spooks, etc... You may take you pick.
My point is stop picking on the Hayes as I believe that the UUUUUs
is the UFO mystery of 1200 Baud modems in general, not any problem
with the Hayes (I have used a 300 Baud Hayes briefly and feel that
the Hayes modems by definition are faultless and flawless by their
nature :-) ).
Cheers,
Gern
-------zben@umcp-cs.UUCP (04/23/84)
[There is a large, oversized SHell between you and your Unix...] The same thing happens to me occasionally using a Penril 1200 baud modem. One of the modems (and I cannot know whether it is my modem or the modems at the central site) decides to go into some testing mode. Large numbers of the letter U get sent in both directions. Seems there is some out-of- band signal by which one modem requests the other to go into test mode. Line noise seems to occasionally trigger one of the modems of the pair. This is a minor hassle, but I recover by placing the local modem into the test mode (with the switches on the front panel), then a few seconds later popping it back into normal mode. This seems to send the out-of-band signal, and puts the OTHER modem back into normal mode. Try this (although if you don't have switches you may be up the creek). -- Ben Cranston ...seismo!umcp-cs!zben zben@umd2.ARPA
dmmartindale@watcgl.UUCP (Dave Martindale) (04/24/84)
The 1200-baud modems I'm familiar with (Vadic) have a switch to disable "respond to remote test". Others may too. Check yours, and turn it off if you have one.