RE: (PM) Stuck Modems on PM2E

Chad Schwartz (cwsmail@citilink.com)
Fri, 5 Jun 1998 09:19:34 -0500 (CDT)

> I don't know much about the USR's, but this suprises me. Portmaster units
> drop DTR when the port is reset, and most modems do a hard reset upon DTR
> drop. This is a configurable item on the modem (usually at&d3).

Hrm. Always used at&d2.

Its a much harder connection drop, and drops IMMEDIATELY, if the user
drops carrier, rather than waiting about 10 seconds, then seeing the
carrier is dropped, then resetting it.

I haven't looked at a modem manual in so many years, that I couldn't tell
you what the differences are...

I *CAN* tell you, that with some brand modems, I've had trouble with AT&D3
on various modems, with a portmaster. (pm-11, pm2, pm2e, etc.) Those
modems that I had trouble with, AT&D2 worked just fine.

Chad

Disclaimer Note: I note that the conversation was about lockups on an
mp/16 with a Livingston Portmaster. My blurb will not fix the problem
with the MP/16-Livingston combo. AFAIK, the only way to reverse the
problem, is to powercycle the MP/16.

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