Multi-Tech Systems MT5634ZPX-PCI owner manual Operating Your MultiModemZPX-PCI, Simple Operation

Owner’s Manual

Operating Your MultiModemZPX-PCI

You control your MultiModemZPX-PCI by issuing AT commands and setting S-registers. Since your MultiModemZPX-PCI is set up for typical user application—traditional modem set to make a dial-up call to a remote installation where the call is answered automatically—you shouldn’t need to change the current default configuration. (If you know your application does not follow this profile, refer to Chapter 3 for AT commands and S-registers.)

In operating your MultiModemZPX-PCI, it is likely that you will use your data communications software to either:

•Enter terminal mode, where you can speak most directly to the modem by issuing AT commands, or

•Launch a data communications session through a set of modem configurations that you select and then associate with a target telephone number. Once you create, save, and name this set of information according to your connection needs and your datacomm software’s conventions, the software simplifies dialing because you don’t have to reconfigure the modem nor have the risk of typing incorrect information.

Either way, be aware that an AT command is the method by which your modem is controlled and must therefore prefix nearly all commands. AT stands for attention and alerts the modem that a command follows. You can enter AT commands with uppercase or lowercase characters. Once you’re in terminal mode, enter AT followed by <cr> to check whether your modem is operational. If everything is fine, your modem responds OK.

Simple Operation

You can dial by using the ATD command and the phone number of the modem you want to connect with, e.g., ATD6127853500. Your modem dials the number and makes a scrambling noise as the modem negotiates the kind of connection it can make. Once the modems settle on a common connection, a connect message on your computer’s video displays. To hang up, enter +++ATH0<cr>. The modem hangs up and your video displays OK, signifying it is ready for another command.

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