Ericsson ZAT 19.2 Operation Manual page 25

2.4 Getting started
The modem is operated from a data terminal (DTE) using one of the
following command sets:
e AT (ATtention) command set.
e ITU-T V.25 bis command set.
2.4.1 AT- Modem init string
The modem initialisation string is sent to the modem every time
you begin. The string may vary among different types of
modems. The default, configured for Hayes compatible modem
is AT, a command line prefix
2.4.2 ITU-T V.25 bis
A command standard set by the ITU-T (Comit, Consultatif
international Télégraphique). The V.25 bis commands are only
used in connection with the dialling procedure. The modem
must be configured by means of AT commands.
LZTR104006 R1.00
2-7
Zat 14.4/14.4-7 and Zat 19.2/19.2-7