Definitions for "HAYES COMPATIBLE"
This is the most widely distributed type of MODEM. It is named after the company which produced the first, standardixed modems.
A modem is considered Hayes Compatible if it supports the Hayes command set (a language used to communicate with and control a modem).
An industry standard among modems and products using command language developed by Hayes Microcomputer Products Inc. known as AT command set. Virtually all modems manufactured today are Hayes compatible.