TIZIANO 56 MEMORY
Modem AT Command Set
3.1
3.
MODEM AT COMMAND SET
The modem supports a complete AT commands set to define the configuration,
initiate or terminate modem communication, test the modem and the
communication link. The modem will work in two basic operations: command
mode and data mode.
COMMAND mode is when the modem is not connected to another modem,
therefore “Off Line” or in a idle condition. In this mode the modem will accept
commands beginning with AT prefix. DATA mode is when the modem is
connected to another modem, that is an “On Line” condition or functioning. In
this mode all the characters sent from computer are interpreted as data and
they are sent to the remote modem. You may switch from data to command
mode by entering an escape sequence. The default escape sequence is
+++. To be valid, the sequence must be followed by an AT command, i.e.
"+++AT<CR>".
Data Length
Digicom's modems can manage the following ASCII code formats:
CASE
START BIT
DATA BIT
PARITY
STOP BIT
TOT
1
1
7
1
1
10
2
1
8
0
1
10
3
1
7
0
2
10
4
1
8
1
1
11
The modem will accept even, odd, mark, or space.
3.1.
AT COMMAND SET DESCRIPTION
NOTE:
"
l
"
default factory commands
AT
Attention
All the characters following the letters ‘AT’ are commands. In AT command
mode the modem automatically detects the computer speed and parity format.
The modem will response using the same speed and parity format of AT
command.
ATA
Answer incoming data call
Cause the modem to go off hook and attempt a handshake in answer mode.
