Abstract: Disclosed is a serial communications protocol for connecting a master and a plurality of slaves using three communication lines. The protocol establishes a method for communication between the master and any slave. Any device on the communication bus may initiate the communication. A method of arbitrating any bus collisions is also given.

Abstract: A system for dynamic allocation of voice and data channels in a time division multiplexed telecommunication system is disclosed. Multiple time division multiplexed lines are provided between a Teleco central office and a number of remote terminals. The time division multiplexing provides multiple channels on each of the multiple DSL lines so that multiple POTS devices can be connected to a single remote terminal. In addition, the remote terminal provides a high speed data port for connection to a data device such as a computer, a router, a bridge, a switch or other similar devices. The multiple TDM channels on each DSL line are allocated so that all of the channels are available for transmission of voice signals and all of the remaining open channels are available for the transmission of data signals.

Abstract: Disclosed is a switching array for the switching of electrical signals from any input to any output. Large arrays are built upon a recursive use of small arrays that are connected such that several paths are available for the routing of each signal. The resultant arrays may be fault tolerant in that the failure of a single switch does not impede the ability for the system to make connections from one point to another.

Abstract: Disclosed is a serial communications protocol for connecting a master and a plurality of slaves using three communication lines. The protocol establishes a method for communication between the master and any slave. Any device on the communication bus may initiate the communication. A method of arbitrating any bus collisions is also given.

Abstract: Apparatus and methods for a remote cable switching system for selectively switching pairs of an incoming trunk to one or the other corresponding pairs of two available outgoing trunks are disclosed. The system includes at least one remote switch module, a normally quiescent remote control module, and a central office controller which provides the remote control module with operating power and with switching commands during a command sequence. The remote control module accumulates power and decodes the sent switching commands in order to operate identified bistable switches of the switch module to establish the desired matrix. Circuitry for remotely testing proper tip-ring orientation of the connected pairs is provided at the central office is also disclosed and claimed.