Subscriber line multiplexer

• US 6,212,204 B1
• Filed: 11/22/1995
• Issued: 04/03/2001
• Est. Priority Date: 11/22/1995
• Status: Expired due to Fees

• Current Assignee: Clayton S. Depue
• Original Assignee: Clayton S. Depue
• Inventors: Depue, Clayton S.
• Primary Examiner(s): Pham, Chi H.
• Assistant Examiner(s): YAO, KWANG BIN
• Application Number:
  US08/562,197
• Time in Patent Office: 1,959 Days
• Field of Search: 370/112, 370/71, 370/485, 370/493, 370/535, 370/536, 370/537, 370/542, 379/156, 379/160, 379/167, 379/90, 379/98
• US Class Current: 370/485
• CPC Class Codes: H04M 9/022 Multiplex systems

Abstract

A system for the connection of any standard analog terminal subscriber telephone equipment, e.g. analog telephone, facsimile, and analog computer modem devices, to be utilized concurrently at a location interior to the building that is serviced by the single conventional two conductor telephone wire. The simple installation of the present invention'"'"'s Master Subscriber Line Multiplexer Unit at the nearest interior or exterior location of the attachment of the telephone service provider'"'"'s two conductor analog subscriber lines and the premise owned interior conventional two conductor analog telephone subscriber wire. The Master units input are two of the telephone service provider'"'"'s two conductor analog subscriber lines. The control and voice and data signals are then multiplexed and transmitted over an interior conventional two conductor analog telephone subscriber wire to a remote location service by the wire. The present invention'"'"'s Slave Subscriber Line Demultiplexer Unit provides demultiplexion, detection, and properly reproduces the control, data, and voice signals for each separate analog two conductor telephone subscriber lines.

Claims

1. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises comprising:

at least two external analog telephone subscriber lines supplied by a telephone service provider including data, voice, and control signals;

a master multiplexer subscriber line unit located external to said subscriber'"'"'s premises comprising;

at least two frontend electronic connections to said at least two external analog telephone subscriber lines supplied by the telephone service provider;

multiplexing and demultiplexing circuitry for data voice communications for said at least two external analog telephone subscriber lines;

detection and generation circuitry for analog telephone signaling and control;

an interior preexisting conventional two conductor telephone wire;

a slave demultiplexer subscriber line unit located within said subscriber'"'"'s premises comprising;

at least two output electronic connections for the generation of signals for two internal analog telephone subscriber lines for connection to analog terminal subscriber equipment;

multiplexing and demultiplexing circuitry for data voice communications for said at least two internal analog telephone subscriber lines;

AC power supply provided by said subscriber;

detection and generation circuitry for analog telephone signaling and control, and

wherein said at least two external analog telephone subscriber lines supplied by a telephone service provider are functionally connected to said analog terminal subscriber equipment through said master multiplexer, multiplexed across said interior preexisting conventional two conductor telephone wire, received by said slave multiplexer and connected to said at least two internal analog telephone subscriber lines thereby increasing the internal preexisting line capacity without physically adding additional lines internally.

2. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprising electronic circuitry for the detection of multiplexed rotary pulse dial codes and Dual Tone Multifrequency (DTMF) dial tones for each subscriber terminal line being transmitted over interior preexisting conventional two conductor telephone wire.

3. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 2, wherein electronic circuitry for generation of both rotary pulse dial codes and Dual Tone Multifrequency (DTMF) dial tones for each of the at least two analog telephone subscriber lines is supplied by the telephone service provider to the central office telephone switch for outgoing telephone calls.

4. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprises electronic circuitry to detect call progress signals from the dial central telephone office switch for all of the at least two analog telephone subscriber lines supplied by the telephone service provider.

5. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 4, further comprising electronic circuitry for the multiplexing of the call progress tones over interior preexisting conventional two conductor telephone wire.

6. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprising electronic circuitry to detect multiplexed terminal subscriber telephone equipments'"'"' on-hook and off-hook control signals.

7. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 6, further comprising electronic circuitry for the seizing and release of any of the two, or more, analog telephone subscriber lines supplied by the telephone service provider.

8. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprising electronic circuitry for the detection of power failure and automatic power failure reset.

9. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprising electronic circuitry for the multiplexing and demultiplexing of the voice and data for outgoing and incoming calls for both of the analog two conductor telephone subscriber lines transmitted over interior preexisting conventional two conductor telephone wire once the telephone call has been established between originating and distant terminal subscriber equipments.

10. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, wherein said at least two analog two conductor subscriber telephone lines generate and detect all the analog control, data and voice signals necessary for the connection of any standard analog terminal subscriber telephone equipment for communication purposes.

11. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, wherein both rotary pulse dial codes and Dual Tone Multifrequency (DTMF) dial tones for each subscriber terminal line are multiplexed over said interior preexisting conventional two conductor telephone wire.

12. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprises demultiplexing of the call progress tones over interior preexisting conventional two conductor telephone wire.

13. A system for increasing the capacity of preexisting subscriber lines located within a subscriber'"'"'s premises according to claim 1, further comprising a switch selectable input alternating current source range to support various countries'"'"' alternating current power sources as necessary with an output voltage of direct current for input to both the Master Multiplexer Subscriber Line Unit and the Slave Demultiplexer Subscriber Line Unit.