Abstract: A high-speed electrical data transmission system (10) includes a signal mixer (13) for receiving high-speed data from external network transceiver (12). The signal mixer (13) converts the data into an electrical current-fluctuating data signal. A signal processor (17) is located remotely of the signal mixer (13) and is connected electrically thereto by a simple/inexpensive cable (15) having only two operative conductors and receives the current-fluctuating data signal via the cable (15). The signal processor (17) converts the current-fluctuating data signal into a voltage-fluctuating data signal for distribution to a local area network.

Abstract: A high-speed electrical data transmission system (10) includes a signal mixer (13) for receiving high-speed data from external network transceiver (12). The signal mixer (13) converts the data into an electrical current-fluctuating data signal. A signal processor (17) is located remotely of the signal mixer (13) and is connected electrically thereto by a simple/inexpensive cable (15) having only two operative conductors and receives the current-fluctuating data signal via the cable (15). The signal processor (17) converts the current-fluctuating data signal into a voltage-fluctuating data signal for distribution to a local area network.

Abstract: A security alarm system includes a camera, an alarm control panel, a mixer at the camera, a signal processor at or associated with the alarm control panel, and a single cable comprising only two operative conductors extending between the mixer and the signal processor. The cable provides current to the camera via the mixer and provides a tamper circuit as well as conveying video signals to the signal processor.

Abstract: Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors only, providing power to the remote input/output device. A signal processor at the controller monitors and processes voltage and current in the conductors to affect functions of the alarm system. A mixer at the remote input/output device processes voltage and current in the conductors to affect functions of the alarm system.

Abstract: Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm control panel and each event sensor (such as a PIR). Two of the conductors might provide current to a motion detector, two of the conductors might provide a circuit for a tamper switch, and two of the conductors might provide an indication of the motion detected by the motion detector. Wiring costs are reduced in the present invention by providing only two conductors which work to provide all of the functions of a six-conductor cable. To attach the two-conductor cable to a six-point terminal on the control panel, a special signal accessor and separator circuit is provided with six contacts to attach to the control panel terminals and two terminals for connecting to the conductor cable.

Abstract: Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm controller and each remote input/output device (such as an entry keypad). The present alarm system has an alarm controller, a remote input/output device, a cable extending from the alarm controller to the remote input/output device, the cable comprising two conductors only, providing power to the remote input/output device. A signal processor at the controller monitors and processes voltage and current in the conductors to affect functions of the alarm system. A mixer at the remote input/output device processes voltage and current in the conductors to affect functions of the alarm system.

Abstract: Normal hard-wired domestic burglar alarms have cables with six conductors extending between the alarm control panel and each event sensor (such as a PIR). Two of the conductors might provide current to a motion detector, two of the conductors might provide a circuit for a tamper switch, and two of the conductors might provide a circuit for a tamper switch, and two of the conductors might provide an indication of the motion detected by the motion detector. Wiring costs are reduced in the present invention by providing only two conductors which work to provide all of the functions of a six-conductor cable. To attach the two-conductor cable to a six-point terminal on the control panel, a special signal accessor and separator circuit is provided with six contacts to attach to the control panel terminals and two terminals for connecting to the conductor cable.

Abstract: Computer apparatus provides distribution of processing among a plurality of loci of control. Specific loci of control include an origination point, an entry point to a recipient's mailbox, in a recipient's mailbox, an exit point from a recipient's mailbox and a completion point after a last recipient. Processing is performed in a foreground or background task, and interactively or non-interactively at each desired loci of control. Processing includes invocation of an application automatically upon receipt of subject data at a focus of control or upon manual command by the recipient at the locus of control. Pre-existing applications are invoked through a common interface between the present invention apparatus and pre-existing applications. A data update routine records recipient's modification of the data during recipient editing in multiple sessions at a locus. A recovery routine insures that at most the last editing session is lost in a system crash.