Home and small business phone system for operation on a single internal twisted pair line and methodology for operating the same
First Claim
1. An improvement in a method for communicating over a single two-wire cable with a plurality of remote station units comprising the steps of:
- bidirectionally serially communicating on a single twisted pair of wires with said plurality of remote station units by addressing a plurality of registers included within each of said remote station units in a sequence of time frames, each said time frame divided into a plurality of time slots corresponding to the said plurality of remote station units, each of said plurality of time slots being dedicated for communication to a specified one of said plurality of remote station units and an addressed one of said plurality of registers in said specified one of said remote station units, said step of bidirectionally serially communicating comprising the steps of communicating serial digital data to said plurality of remote station units only by means of communicating in at least one fixed portion of said plurality of time slots without handshake protocol and communicating control signaling data in at least another fixed portion of said plurality of time slots, each of said time frames having a frame sync included therein to which said remote station units synchronize communication on said two-wire cable.
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Accused Products
Abstract
A telephone communication system for communicating between a plurality of exterior telephone lines and a single common in-house two wire line is comprised of a control unit for coupling to the plurality of exterior telephone lines and for controlling communication between the plurality of telephone lines and the common two wire line. A plurality of station units are coupled remotely throughout the building to the common two wire line. The control unit communicates on the digital channel with the plurality of station units in a time frame subdivided into a plurality of time slots. A specified portion of each time slot is reserved for control communication between the control unit and each one of the plurality of station units. A synchronization signal is transmitted for phase locking all the station units to the control unit clock and a common frame synchronization signal is used to align all units in time. Each remote telephone or adapter box has a unique number assigned to it by the setting of a manual switch. Each number corresponds to a slot in a time frame. Thereafter all control signaling to a specific station unit occurs in a particular time slot.
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Citations
14 Claims
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1. An improvement in a method for communicating over a single two-wire cable with a plurality of remote station units comprising the steps of:
bidirectionally serially communicating on a single twisted pair of wires with said plurality of remote station units by addressing a plurality of registers included within each of said remote station units in a sequence of time frames, each said time frame divided into a plurality of time slots corresponding to the said plurality of remote station units, each of said plurality of time slots being dedicated for communication to a specified one of said plurality of remote station units and an addressed one of said plurality of registers in said specified one of said remote station units, said step of bidirectionally serially communicating comprising the steps of communicating serial digital data to said plurality of remote station units only by means of communicating in at least one fixed portion of said plurality of time slots without handshake protocol and communicating control signaling data in at least another fixed portion of said plurality of time slots, each of said time frames having a frame sync included therein to which said remote station units synchronize communication on said two-wire cable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A circuit for communicating over a single two-wire cable with a plurality of remote station units comprising:
means for bidirectionally serially communicating with said plurality of remote station units in a sequence of time frames, each said time frame divided into a plurality of time slots corresponding to said plurality of remote station units, each of said plurality of time slots being dedicated for communication of said control signaling data to a specified one of said plurality of remote station units, said means for bidirectionally communicating comprising; means for serially communicating serial digital data only by means of communication in at least one fixed portion of one of said plurality of said time slots, and means for serially communicating control signaling data only by means of communication in at least another fixed portion of said one of said plurality said time slots without handshake protocol, each of said time frames having a frame sync included therein to which said remote station units synchronize communication on said two-wire cable. - View Dependent Claims (9, 10, 11, 12, 13, 14)
Specification