[comp.sys.apple] Strange problem with Datalink Modem

robertr@well.UUCP (Robert J. Rodriguez) (01/08/90)

I purchased a Datalink Modem (2400 baud) about 2 months ago, and in general
I'm very happy with it. However, I'm running into occasional problems at
1200 baud. After running the Apple IIE enhanced for about 20-25 minutes at
1200 baud, characters start to get progressively garbled in both 
directions, and AT commands are sometimes converted to A% or A$ or A>, which
the modem doesn't accept. Even the output from a command like AT &V comes
out jumbled. Only turning off the machine for a couple of hours clears up
the problem. Oddly, the problem never occurs at 300 or 2400 baud. My 
machine currently has a CPM card, a mouse, 2 drives (5.25 inch), a fan and
a surge protector. Has anyone seen a similar bug? I tried to contact Applied
Engineering but their technical support line has been constantly busy.

TSEMM@ALASKA.BITNET ("Ed 'Apple Guru' Moore") (01/08/90)

In my High School, the same thing happened with a dataline 1200.  We traced
it down to the fan, and bought a system saver IIGS, and it worked fine after
that.  Maybe your fan isn't working up to par?