User Manual

Configuration
RFI-9256 Radio Modem User Manual Page 12 of 96
CARRIER DETECT
When carrier detect is green it shows that the unit can hear a remote radio. Slave radios in a network should
always show carrier detect, as master radio radios are constantly transmitting a synchronization signal.
Master radios however will only show this LED when connected to a slave in point-to-point or Hayes dial-
up mode, or when receiving user data. Generally it can be assumed that if a slave can hear its master then the
master can also hear its slave.
In a good radio network carrier detect should be predominately green with flashes of red. A flash of red
indicated that one RF packet has been lost. It is acceptable, and expected, that some RF packets will be lost
as the RFI-9256 operates in an industrial, scientific, and military band (ISM) where there is a potential for
interference from other radios. A red flash of carrier detect does not mean user data has been discarded, as
the RFI-9256 will retry any packet that is lost or corrupted during transmission.
TRANSMIT DATA
Transmit data indicates that data is being pushed out of the radio serial port; the colour of the LED does not
matter. The LED indicates that data has been received from a remote radio and transmitted out of either the
main or auxiliary serial port. If the LED is lighting up, but the end unit is not receiving data it could indicate
a damaged/broken serial cable, latency issues with the protocol of the end device, or incorrect serial port
configuration.
The transmit data LED will also flash when local Hayes commands are issued or the terminal menu is being
used.
RECEIVE DATA
Receive data indicates that data is being pushed into the radio serial port; the colour of the LED does not
matter. The LED indicates that data has been received from the end unit on either the main or auxiliary serial
port and sent through to the remote radio. If the remote radio is not receiving the RF data, given there is a
sufficient RF path (as indicated by the carrier detect and network link LEDs), there may be a problem with
the radio addressing or protocol routing in the radio set-up.
The transmit data LED will also flash when local Hayes commands are issued or the terminal menu is being
used.
ONLINE
When the online LED is green it shows that a packet has been received from a remote unit. The Online LED
will remain green while two units are connected in point-to-point mode or Hayes dialup mode. It is not
expected that the online LED will flash red in mode 1, a red Online LED indicates that there is something
wrong with the RF link, including mismatched frame time, directional bias settings, or a poor signal path.
POWER / FAULT
The power/fault LED indicates whether there is something seriously wrong with the radio configuration. In
normal operation the power/fault LED will flash green. When the Power LED flashes red there is most likely
something wrong with the serial configuration between the radio and the end device. The red LED can also
indicate an internal fault in the radio; the diagnostics fault log menu can provide more information. There are
two possibilities for the power/fault LED flashing red.