Summary

This Recommendation defines commands and responses for use by a DTE to control a V-Series DCE using serial data interchange over an asynchronous interface. It contains four elements:

–           codifies existing practice in common GSTN-DCE that use the ATtention (AT) command set;

–           defines a format for orderly extension of the AT command set;

–           provides a set of standardized extensions for common functions to identify the DCE, to control the DTE-DCE interface, and to control DCE-DCE protocols (signal conversion, error control and data compression);

–           provides a mapping for these commands into V.25 bis frame format for use with DCEs employing synchronous serial interfaces.