Abstract: An advanced telecommunication system is provided for central control of electronic signs. A display development kit is provided to create binary display programs which create visual activity on one or more electronic signs. These display programs are stored on the disk drive of a system control computer which periodically runs a system control program to upload display programs to the electronic signs using radiopaging signals. The system control program employs a telephone modem to connect through a public switched telephone network (PSTN) to a paging terminal. In accordance with the system control program, the system control computer divides each display program into multiple packets which are transmitted to the paging terminal as alphanumeric radiopages. The paging terminal encodes the packets into radiopaging format, frequency shift key modulates the data, and transmits the pages on a radio frequency channel. Electronic signs decode the radiopages into data packets.

Abstract: An improved telephone paging system and method are disclosed. The sytem interfaces with a conventional telephone branching system, such as a PBX, and remote pager devices which are worn by subscribers to the system. A plurality of PBX extension telephone lines are connected to the system via a subscriber line interface, and one PBX extension line is connected to this system via a control line interface. The subscriber line interface is used to detect ring signals on the selected extension lines. When a ring signal has been detected on a selected line, the microprocessor-based system sends command signals to the PBX to place the incoming call on hold. The system identifies a paging code signal distinctively corresponding to the subscriber line on which the ring signal was detected. The identified paging code signal is sent to a transmitter which transmits the paging code signal to all pagers within its range.