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Dialing a Serial Modem Through Notepad

Dialing a Serial Modem Through Notepad

Dialing a Serial Modem Through Notepad

I am working on a project in which I need to make a US Robotics 56K Sportster modem dial by printing a string from notepad.
So far I have managed to test the modem by using port capture to receive the dial string commands needed to dial the modem.
I have logged into the modem using Hyperterminal and I have entered the commands succesfully and the modem dialed as expected.

I have configured a generic printer to send a text only string to the serial port, with the modem hooked up and the port configurations as

Bits per second: 115200 (the fastest the 56k can handle)
Data Bits: 8
Parity: 0
Stop Bits: 1
Flow Control: None

I set the printer in notepad to being the generic printer with the txt string: W#ATDT819545551212

This string when entered through hyperterminal commands the modem to
W# Wait for Signal
AT Attention
DT Get Dial Tone
8 Outsideline
19545551212 The number to dial.

It appears that the modem starts to follow the commands as the lights fliker once quickly (Clear to send is always on, Terminal ready then send data, then received data light up in roughly half a second in order then go out)when I send the print file.

I know this is a tricky challenge but I have less than 1 week to resolve the issue and make the notepad dial the phone number.

If anyone has any suggestions I would be happy to hear them.
The only stipulations are that I need to use the serial modem on the serial port, the generic printer must be what sents the signal, and I cannot use Printer Drivers, the program that will be eventually using this setup has no interface other than text send, once notepad can do it then the same configuration will work with the other system.


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