Banks often use LED displays in supermarkets, gas stations,malls, and other public venues to publicize various realtime financial data, such as stock market quotes, currencyexchange rates, and even promotion programs. Wireless technologies provide a convenient way to implement this type of system. The display can be isolated from thenetwork system of the building, thereby avoiding potential communication failure in case the building's network goesdown. Since the data transmitted are not very large, it is best to use a GSM/GPRS network. One of our clients, a bank in the United States, required a wireless solution for transmitting financial news and updates to LED boards along interstate highways.

Application Requirements

• Instantly transmit financial data to LED boards along different interstate highways
• Notifications to confirm that the data transmitted was received by the LED boards

Each LED board has an RS-232 port that allows the board to be connected to a cellular network via a cellular modem.
By installing Moxa’s OnCell G2100 series cellular modems, the operator can send the data via SMS format to all the display boards along the highways. Although traditional cellular modems need to be configured with AT commands, the special SMS tunnel mode of Moxa’s OnCell G2100 series cellular modems eliminates the need for users to setcomplicated AT commands in order to transmit and receive data to and from the bank’s control center. Furthermore, the cellular modem can send SMS messages to 4 LED boards at one time.