Appendix C Hayes AT Command Reference
RFI-9256 Radio Modem User Manual
Page 90 of 109
Command
Description
AT&G0
Multi-port operation.
AT&G1
Exclusive port control. The other serial port will always return
BUSY
whenever an attempt is
made to dial out.
AT&G2
Priority port control. If the other serial port already has a connection established then it will
be immediately disconnected when the priority port (this port) issues a dial command, and
the other serial port will always return
BUSY
whenever an attempt is made to dial out.
Table 29: AT&G exclusive port control commands
The radio should be restored to multi-port operation after hanging up from the remote radio or at the end of
session.
C.1.14
“AT&K” Flow Control
The flow control mode for the current serial port is selected using the
AT&K
command. The selection options
Command
Description
AT&K0
Flow control is disabled.
AT&K3
RTS/CTS hardware flow control is selected. This option is only available for the main serial
port.
AT&K4
Xon/Xoff software flow control is selected. This option is available on both the main and
auxiliary ports.
Table 30: AT&K flow control commands
C.1.15
“AT&V” View Active Profile
The current configuration of the radio can be viewed using the
AT&V
command. The items that can be
viewed are shown in Table 31.
Command
Description
AT&V
Displays all registers except for I registers.
AT&V1
Displays all I registers.
AT&V2
Displays all S registers.
AT&V8
Displays the current communications links.
AT&V9
Displays the fault / diagnostics log.
Table 31: AT&V view profile commands