There are a few other ways to perform diagnostics on a modem and issue special configuration commands. Refer to your modem's manual for configuration and diagnostic commands. Once you know the modem is at least communicating with the computer, you can use an AT command to perform further diagnostic testing or change configuration settings.

Select Echo Type Characters Locally and click OK twice. If you don't see the AT text appear when you type, choose File Properties, click the Settings tab, and then click ASCII Setup.

These are some of the AT commands for my Compaq Armada M300 laptop's built-in modem. You should receive an OK message if your settings are correct and the modem is working, as shown in Figure A. When using a modem, you can type AT and press in the HyperTerminal connection to test communications. When you click OK, HyperTerminal will immediately open a connection to the port. For most devices, you can typically use 8 data bits, no parity (set to None), one stop bit, and hardware flow control. Then, choose communications parameters that match the device.In the port property sheet that appears, choose a port speed (bits per second) that matches the device.In the Connect To dialog box, choose the COM port being used by your modem (usually COM1 or COM2) from the Connect Using drop-down list and click OK.Specify a name for the connection, choose an icon, and click OK.If no connection(s) exists, you can click File New Connection to create a new one. Once HyperTerminal opens, it will automatically prompt you to create a new connection if none exist.Click Start Programs Accessories Communications HyperTerminal.Starting HyperTerminal and setting up a new connectionīefore you can use HyperTerminal to troubleshoot your modem, you must create a connection to the port the modem is using. Once connected, a few simple commands are all that are needed to operate the sensor: This just pings the port and the sensor responds with “A” to indicate that it is set up. To set up Hyperterminal or other terminal emulation program to communicate with the sensor, select the appropriate COM port in the program and connect. In Windows 95/98, click on the ‘Windows Setup’ tab and then select ‘Communications’. If not then you can add HyperTerminal via ‘Add/Remove Programs’ in the Windows Control Panel. Windows comes with a comms program called ‘HyperTerminal’ which is installed with Windows by default. These capabilities can help you determine whether or not the modem and computer are communicating correctly.

Through HyperTerminal, you can reset the modem or issue configuration and diagnostic commands. The HyperTerminal tool, included with Windows 2000, allows you to communicate directly with your system's modem.

Hyperterminal command list