Appendix C

AT Command Set Reference

This appendix provides information for using AT commands for the Model XM128 ISDN Digital Modem.

Operation Mode of the DTE Interface

The operation mode for the DTE interface is Simplex mode. This mode is used for conventional AT command operation.

Simplex Mode

In simplex mode, the Model XM128 modem is used just like an ordinary modem. The DTE interface is either in the command state or in the data state. Only one data connection session is possible at any time.

To perform various functions of the Model XM128 modem, a number of different AT commands can be used. The simplex mode is designed for AT command users. The guides and descriptions throughout the rest of this manual, if not otherwise specified, are applicable to this mode. The power-on default of the DTE interface is in simplex mode as well.

AT Command Set Reference

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NETGEAR XM128 ISDN manual Appendix C AT Command Set Reference, Operation Mode of the DTE Interface, Simplex Mode