A friend has installed a "new" Zoom 56k PCI modem into his Compaq
Professional Workstation 5100. Windows can query the modem fine when he gets
"more info" however when trying to dial out he recieves the DUN Dial Up
Networking Error 666 Your modem (or other connecting device) is not
functioning. Therefore it won't dial out. Its almost the same as DUN error
630 but rarer.
He tried to connect to his ISP using Hyperterminal but it won't dial the
number either. I found this information by searching google groups;
"Windows can only test that OS talks to the card - the Uart half -
equivalent to a serial port and part inside modem that talks to the serial
port. The modem has a whole other half - part that talks to phone line,
detects dialtone, negotiates connection speed, dials number, etc. Windows
only sees that it can talk to the Uart half - the simplest half. You don't
know if the other half of that card modem is OK. Debug procedure using
Hyperterminal would also test both halves of the modem - which Windows
diagnostics does not perform."
So we can now say for sure that one half of the modem isn't working OK - ie
"part that talks to phone line, detects dialtone, negotiates connection
speed, dials number, etc."
Is it safe to assume that if there was an IRQ conflict the part the Windows
can talk too "the Uart half - equivalent to a serial port and part inside
modem that talks to the serial port." wouldn't work either.
Or is it possible for a IRQ conflict to cause the other part "part that
talks to phone line, detects dialtone, negotiates connection speed, dials
number, etc" to fail instead. I would of thought that if Windows can talk to
the modem there is no IRQ conflict.
