User manual

2-2 AT COMMANDS: DATA MODEM
Table 1 Modem Commands
Standard Commands
ATA
Answer mode: Modem monitors telephone line
A/ Repeat last command line; entered without “AT”
ATB Switching between BELL/CCITT Standards at 300 or 1200 bps
ATD Enter automatic dialling
ATE
Controlling repeat of modem commands on screen
ATF
Determine type of modulation and speed
ATH
Break off an existing connection
ATI
Information on Modem product code
ATL
Loudspeaker volume control
ATM
Switch on loudspeaker
ATO
Return to Online-mode after entering Esc sequence
ATP
Select Pulse dialling
ATQ
Controlling modem messages
ATS
Read and modify modem register(s)
ATT
Select Tone dialling
ATV
Modem message format (verbal or numeric)
ATW
Directing speed messages
ATX
Modem function during dialling; modem messages
ATY
Long Space Disconnect
ATZ
Modem Reset and Load one of the stored modem profiles
+++
Escape Sequence to return temporarily to Command mode
AT&C
Controlling M5 (DCD) Signal at the serial interface
AT&F
Load the factory setting
AT&G
Switch on a Guard Tone
AT&K
Flow Check
AT&M
Synchronous data transmission with asynchronous dialling
AT&Q
Authorised types of connection
AT&R
Controlling M2 (CTS) and S2 (RTS) Signal at the serial interface
AT&S
Controlling M1 (DSR) Signal at the serial interface
AT&T
Modem test functions
AT&V
Displaying current configuration
AT&W
Storing Modem settings
AT&X
Directing the Clock Signal
AT&Y
Selecting the configuration which will be active after modem start
AT&Z
Storing telephone numbers