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Subject:
From:
Tom Turak <[log in to unmask]>
Reply To:
PCBUILD - Personal Computer Hardware discussion List <[log in to unmask]>
Date:
Thu, 16 Aug 2001 15:54:43 -0400
Content-Type:
text/plain
Parts/Attachments:
text/plain (53 lines)
You can probably fix this by sending a command string to the modem.  Send
command strings from phone number fields, or from a dos box.

To use a phone number field, simply enter the command string
AT&F&D2&W
instead of the phone number and click your 'connect' or 'dial' dialogue
button.  You typically have to take it on faith that something happened
since the only thing you may see is the phone field clear.

To use a dos box, you need to know the comm port the modem is assigned.  If
your modem is on comm2, then at a dos prompt, type

echo AT&F&D2&W >COMM2

you should be rewarded with a new line saying 'OK'.

This works because most every modem supports what's known as the Hayes
Command Set.  To break it down,  AT is 'attention: listen for a command' &F
is 'restore factory defaults' &D2 is 'hang up if DTR goes from on to off'
and &W commits this setting to the power on configuration stored in
non-volatile memory, which does not need a battery, so the modem should
remember this change indefinitely.  Every time the modem powers on or is
told to reinitialize, it will load the 'hang up' setting.

There are several ways to hang up, your phone company is obviously not
confused and is disconnecting, but DTR signalling probably is what your
system is trying to use. Because different software or different drivers may
use variations of commands to signal a desire to hang up, this type of
problem can disappear when you change the modem driver or ISP you use, and a
different hang up command, which your modem recognizes, is employed.  Good
modems and software are failsafe and issue enough commands to be sure of
success.
Tom Turak

-----Original Message-----
From: Mike's Custom Woodworking [mailto:[log in to unmask]]
Sent: Wednesday, August 15, 2001 9:02 PM

I have a friends 166 Pentium on a Rhino MB with 48M ram running Windows95.
It had a generic PCI modem in it and I have tried a Hayes Accura modem in it
also.
It is using a dial up connection to a local ISP.The modem connects to the
isp fine and when you click the icon to disconnect it disconnects from the
isp fine but
it will not disconnect from the phone line.If you physically unplug the line
from the modem and plug it back in you can get a dial tone but it will not
break the connection on its own.I have tried this on different phone
lines,with different cords and with two modems in this computer.

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