User's Manual

Appendix A Hayes Commands
Man_455U Rev 1.0 Page 49
Appendix A Hayes Commands
The following details all of the Hayes commands supported by the 455U. Default settings are
shown by a “dot”, •
Command Function
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 country codes. The baud
rate selected depends on the radio bandwidth setting (AT\N0 or AT\N1)
With Narrowband radio
(AT\N1 selected)
With wideband radio (AT\N0 selected)
B0 Set 1200 baud Set 2400 baud
B1 Set 2400 baud Set 4800 baud
B2•
Set 4800 baud Set 9600 baud
B3 Set 9600 baud Set 19200 baud
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 600 baud
C2 Set 1200 baud
C3 Set 2400 baud
C4 Set 4800 baud
C5 Set 9600 baud
C6 Set 14,400 baud
C7 Set 19,200 baud
C8 Set 28,800 baud
C9 Set 31,250 baud (Foundation Fieldbus + Profibus FMS)
C10 Set 38,400 baud
C11 Set 57,600 baud
C12 Set 76,800 baud
C13 Set 93,750 baud (For Profibus)
C15 Set 115,200 baud
C16 Set 187,500 baud (For Profibus)
ATD Connection/Dialling Control. Dial a specific remote or a stored number. This