Abstract: A communication system for wireless dual purpose phones operable at 1900 megahertz in the PCS system includes a plurality of transceivers wherein at least three communication links are formed. A first communication link is formed between the dual purpose phone and a base station of a cellular network. A second communication link is formed between the dual purpose phone and an antenna placed within an elevated location such as an attic. The antenna is placed in an elevated location to facilitate 1900 megahertz communications with the dual purpose phone throughout the business or home. The third communication link is between a transceiver proximately located and coupled to the elevated antenna and at a transceiver at an accessible location for the user. The use of multiple transceivers to place the antenna in an elevated location avoids a need to use a large, inflexible and aesthetically unappealing coaxial cable between the base unit and the elevated antenna.

Abstract: A communication system is coupled to a cable television network wherein cable television signals, data signals and telephonic signals are transmitted on the coaxial cable infrastructure. To facilitate the simultaneous transmission of cable signals, data signals and telephonic signals, a frequency spectrum is defined for a coaxial cable network in which a band of frequencies for carrying telephonic signals is interposed in the cable television signals bands of frequencies. In a coaxial cable system capable of carrying signals up to 1 megahertz in frequency, a total of 5 frequency bands are defined. Within the frequency band for carrying telephonic signals, signals from a PCS system or the like as well as signals from other telecommunication devices, one system, such as SMS centers, base stations and mobile switching centers may be transmitted.

Abstract: High-intensity LEDs are mountd on or form part of an object to be illuminated. The object has first electrical terminals thereon that are coupled to the LEDs. A portable electrical circuit having second terminals for detachable coupling to the first terminals on the object causes the LED to flash and provide visibility to the object. The electrical circuit is contained in a package that has a first Velcro strip thereon. A second Velcro strip is mounted on the object near the first terminals so that the electrical circuit can be attached thereto by the Velcro strips and the electrical terminals coupled together.

Abstract: A communications system for use in a coaxial cable data transmission system such as in a hotel/motel system between a central processor and a room and the room and appliances within the room wherein frequency shift key modulation of a high frequency signal is used for communication between the central processor and the rooms and amplitude shift key modulation of a low frequency signal is utilized for communication within the room between the in-room controller and appliances within the room. In addition, the system also utilizes a serial interface input/output card in the central processor which detects the quality of the signal coming from each room in regard to frequency, signal level and deviation and stores those signals for maintenance purposes. Also, the system provides for long distance interrogation of the central processor over telephone lines so that the hotel/motel operating system may be reviewed from a remote distance.