TO: SUPRAFAX-L@SUPRA.HOTLIN.FIDONET.ORG
K>I have had several occations where the power will glitch, and after
K>the glitch, the modem has DI on the display.... Only Power cycling the
K>mode fixes it....
K>I have seen this both with a glitch that only seems to affect the
K>modem and NOT the computer system... as well as other glitches that
K>forced the system to reboot... but the modem never came back....
K>These are usually VERY SHORT POWER GLITCHES....
        Yep, I knew that problem about 3 years ago (not surprising since
        Pac Power in Albany serves us both, although my grid is TOTALLY
        down more often than yours).  The easy solution is to run a UPS
        on the BBS! :-)
        If you're running the 28.8k/33.6k units (VFC or V34) the
        other solution is to run a 8.25 to 8.75 VDC regulated supply
        with a BIG cap on the output (6,800uF or bigger).  There's
        a full-wave bridge on the power for those modems.  One thing
        to remember is that the modems signal ground / serial / chassis
        ground is connected to one side of the incoming power, so you
        really want to use an isolated supply. 
-Patrick Moore
 Sysop of Supra BBS 
CMPQwk1.42 331ūSet S11=50 for faster dialing.
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