Ericsson ZAT 19.2 Operation Manual page 40

3.2 AT Command Line Prefix (ATtention code)
Every command line must begin with AT or at. («At» or «aT» is
not a legal command line prefix.)
The command line prefix (ATtention code) is a signal to the
modem that one or several commands will follow.
The modem examines this command line prefix to determine the
communication rate and parity settings of the local DTE.
As part of the description of each command the default value is
indicated with an underscore. These default values are carefully
selected in order to give the user a starting point from where it is
easy to use the modem for most applications. However, there
can be deviations from the standard default setting, due to
national PTT requirements, or as a result of customer requests.
If in doubt about this, the actual default values can be read out
from the modem in the following way:
Load factory profile with command AT&F.
List all settings with command AT\S.
Speed (Bit/s)
300, 600, 1200, 2400, 4800, 7200, 9600,12000, 14400, 19200,
38400.
Character Format
7,N,1 8.N,1
7,N,2 8E,1
7,E1 8.0,1
7,0,1
7= 7 bits, 8= 8 bils, n=none, e=even, o=odd
1=1 slop bil, 2=2 stop bit
The modem then automatically adjusts to this setting until
another AT command is received or until the modem is turned
off .
When a connection is established, speed towards the remote
modem is determined by the last AT command, except when
automatic detection of transmission rate is active (see +M-
command), then the modem will automatically detect any of the
modem standards.
e Several commands may be entered on the same command
line, separated with space if desirable.
e Acommand line must end with Carriage Return <CR>.
3-2 LZTR104006 R1.00
Zat 14.4/14.4.7 and Zat 19.2/19.2-7