Table of Contents
Advertisement
Donatello
3.4.
AT COMMAND SET
The modem support 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 +++ this must have at least one second
before and after being keyed. To go back into data mode simply type ATO.
Data Length
Each caracter of the AT command must be an ASCII code with any of the following format
combinations:
START
1
1
1
1
The modem will accept even, odd, mark, or space.
3.4.1. AT COMMAND SET OF DONATELLO
COMMAND
DESCRIPTION
AT
Attention
A/
Repeat last command
A
Answer incoming data call
D
Dial
E
Echo commands ON/OFF
H
Hang up
I
Interrogate product status
N
Selct speed connection (V.110 only)
O
Go on-line
P
Dial using the digital modem
Q
Return result codes
S
Retrive and store S-registers
T
Dial using the analog modem
V
Select the return codes type
DATA
PARITY
7
1
8
0
7
0
8
1
3.4
Description
STOP
TOT
1
10
1
10
2
10
1
11
Advertisement
Table of Contents
