Ericsson ZAT 19.2 Operation Manual page 39

ommandsets._.
3.1 What is a «Hayes? command»
«Hayes® Smartmodem» from Hayes® Microcomputer Products, Inc.
in the USA was one of the first modems that could be controlled with
the aid of simple commands from the terminal keyboard. These
commands were simple in use and modems rapidly became popular.
Competitors adopted this principle and soon a new industrial
standard was established. Today, all serious modem manufacturers
offer modems employing «Hayes® standard».
Hayes® commands are characterised by the fact that they begin with
the alphabetic characters AT, an abbreviation for the word
«attention». These are followed by one or several codes which
prompt the modem to give automatic reply, dial automatically, close
the connection and much more.
Today's Hayes® standard comprises a few of the basic features of
the early commands. These have been supplemented with a wide
range of commands which are specific for a particular product and its
technical complexity. °
Commands in this book which are Hayes® standard commence with:
AT or AT&.
Commands which are not Hayes® standard commence with: AT),
AT%, AT+, AT+&, AT+\ or AT+%.
For all commands, except the A/ and +++ commands the "Cr"
(Carriage Return) signifies the end of the command line.
"Cr" is marked jenten in this book
Example:
Entering: &F"Cr"
The modem answers: "Cr" LFOK"Cr'' Lf
The Zat 14.4/14.4-7 and Zat 19.2/19.2-7 are compatible with the
ANSI/TIA/EIA-602-1992 AT command standard.
Hayes® is the registered trademark of Hayes Microcomputer Products
LZTR104006 R1.00 3-1
Zat 14.4/14.4-7 and Zat 19.2/19.2-7