User's Manual

Appendix A Hayes Commands
Man_455U Rev 1.0 Page 57
AT\T Inactivity Timeout – Units Seconds. Value 0-255. 0 = Disable. If there is no
activity within this time, the modem drops the connection. See also S Register
S6.
ATA Answer Incoming Call – The modem can also be set to answer incoming calls
immediately or after a certain number of attempts. (See S-Register S0)
ATB Set Radio Baud Rate – Radio Baud rates are 1200, 2400, 4800, 9600 and 19200
baud. Some baud rates may not be possible for some countries. In this case, ERROR
is returned. The Bell 202 and V.23 encodings allow use with existing systems that
use these schemes.
B0 Set 1200 baud
B1 Set 2400 baud
B2•
Set 4800 baud
B3 Set 9600 baud (Available in some countries only)
B4 Set 19200 baud (Available in some countries only)
ATC Serial Baud Rate selection / Automatic Baud Detection control ( These commands
refer to the RS-232 serial port. ATR commands refer to RS-485 port).
C0•
Set automatic baud rate detection
C1 Set 1200 baud
C2 Set 2400 baud
C3 Set 4800 baud
C4 Set 9600 baud
C5 Set 14,400 baud
C6 Set 19,200 baud
C7 Set 28,800 baud
C8 Set 31,250 baud
C9 Set 38,400 baud
C10 Set 57,600 baud
C11 Set 76,800 baud
C12 Set 93,750 baud (For Profibus)
C13 Set 115,200 baud
C14 Set 187,500 baud (For Profibus)
ATD Connection/Dialling Control. Dial a specific remote or a stored number. This
command has a different effect depending on whether it is issued from the RS-232
main serial port (connects to the remote modem’s serial ports) or from the
Diagnostic serial port (Connects to the remote modems diagnostic functions).
ATE Local Echo Control. Enable/Disable Command Echo.
E0 Disable Local Echo
E1•
Enable Local Echo
ATH Hang up/Hook control. End a call, or disable incoming calls.
ATI Modem Identity / Firmware version
ATO Go to on-line
ATQ Quiet mode (Suppress/enable response codes)
Q0•
Enable response codes
Q1 Disable response codes
ATR RS-485 Serial Baud Rate selection.
R1 Set 1200 baud
R2 Set 2400 baud