User's Manual

Appendix A Hayes Commands
Man_455U Rev 1.0 Page 61
on the modem’s operating mode
AT&R
Repeater Functionality– Enable or disable repeating of messages to the wildcard
addresses 0 and 128, and enable or disable sending messages to serial port. (Also
see AT&H command)
&R0•
Don’t repeat messages to the “Wildcard” address (0), and don’t copy repeated
messages out the local serial port..
&R1
Repeat Messages when the wildcard address is the next un-visited
Store&Forward address in the message, and message has done the number of
hops specified by the AT&H setting.
&R2 Send a copy of the message out the local serial port when the wildcard address is
the next un-visited Store&Forward address in the message, and message has
done the number of hops specified by the AT&H setting.
&R3 Do both Actions – Forward the message and send a copy of the message out the
local port – when the next store & Forward address is the wildcard address and
the message has done the number of hops specified in the AT&H setting.
AT&T Self Tests. Allows in-field diagnostics, and factory testing.
&T0 Transmit Bit Error Rate Test. Generates pseudo random data and sends out radio.
&T1 Receive Bit Error Rate Test. Receives data from &T0 modem, and records BER
statistics.
&T2 Transmit & Receive BER Test. Used with a second module configured as a
transparent repeater.
&T3 RSSI Measurement. Monitors the received signal strength, and displays in dBm.
AT&V View Current Configuration – List the value of all settings as well as S-Registers
(except &P settings).
&V0 Same as AT&V
&V1 Only show settings that are different from the defaults.
&V2 Show all settings, including &P and &Q settings.
&V10 View configuration in non-volatile memory
&V11 As for V1, but configuration in non-volatile memory
&V12 As for V2, but configuration in non-volatile memory
AT&U Set modem’s Unit Address (non-standard command for E455U only) Range 0-127.
Default 1. The Unit address is used to identify the module in the system. It should
always be set to a unique number within the modems in the system. This address is
also used to access to the module using the remote diagnostics protocol.
AT&W Write Current Configuration to non-volatile storage
AT&Z Stored Numbers – Up to 4 stored numbers, also “Auto Connect” number for leased-
line mode. Format: “AT&Zx=nn,nn,nn,nn”. “x” = 0 to 3. “nn” = 1 to 127. Z0 is
used for the auto-connect number.
AT\B Generate Break signal at remote modem.
\Bn “n” is the break length in units of 0.1 seconds.
ATF
Set Radio Frequency (Requires Radio access Password)
FT=xxx.xxxx Set Transmit Frequency xxx.xxxx MHz – Returns ERROR if outside radio
range.
FR=xxx.xxxx Set Receive Frequency xxx.xxxx MHz – Returns ERROR if outside radio
range.
AT\K Break signal handling control
AT\B command from online Host sends break on serial Receive break from remote