Bush PC Advanced Connection Help
Computer solutions for Australia's rural and remote communities.
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Changing the Advanced settings on your modem's connection is fine, if you know the Extra Settings string is correct for your modem.
Most people don't have the correct documentation, and often the documentation doesn't contain all the necessary commands.
The best way to find out what's what is to interrogate the modem directly.
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Step One:
Communications Software.
Most versions of Windows come with a program called HyperTerminal.
It is usually amongst the Accessories (Start, Programs, Accessories [, Communications]).
If it is not there, it can be installed from the original Windows CD
(Start, Settings, Control Panel. Add/Remove Programs. Windows Setup. Communications. Details.).
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Step Two:
Talking to your modem.
Open HyperTerminal.
In the New Connection dialog, enter anything (e.g. "test"), and click OK.
In the Connect To dialog, enter any number (e.g. "468"), and ensure that your modem is selected in the "Connect Using" drop down list, then click OK.
In the Connect dialog, click cancel.
In the HyperTerminal window, type "AT" (without the quotes) then press enter.
If the response is "OK", then you are talking directly to your modem.
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Step Three:
Issuing commands.
Enter one of the commands:
- AT-V90=0
- AT+MS=11,1,9600,33600
- AT+MS=V34
then press enter.
This instructs the modem not to use the fastest protocol.
If it responds with ERROR, you need to try a different command.
If it responds with OK, then you're (probably) in business.
Some modems respond with OK, and ignore the command anyway.
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Step Four - Optional
You can tell the modem to remember this setting and always use it, by entering the command "AT&W".
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Step Five:
Finishing Off.
Close HyperTerminal.
Click on the close button (X in the top right corner).
At the prompts, click "Yes" for "Are you sure you want to disconnect", and "No" for "Do you want to save this session".
If your modem reports "ERROR" for all of these commands, you might have to adjust the S register values.
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Some examples of the more common S register commands include:
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"ATS38=12" may slow down the modem, but probably only in one direction (upstream).
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"ATS39=0" may disable K56Flex, and "ATS39=2" may slow the downstream rate.
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If it's a Swann modem, you might try ATS38=0 and ATS37=19.
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The best way to find the right command is to read the documentation that came with your modem.
You might also try visiting Modem Site,
Modem Help and search for a command that works for your modem.
To reset your modem to its original configuration, use the commands
- AT&F - restore factory settings, then
- AT&W - save these settings as the default.
All of this discussion focuses on forcing the modem to use of the V34 protocol instead of the faster V90 protocol.
There are rare circumstances where even V34 is too fast for some phone lines.
Disabling V34 follows a similar procedure to that outlined here, but should only be considered as an absolute last resort.
(The command +MS=V32 drops the maximum speed of the modem in our Dell to 14,400.)
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