Coded telephone access system

• US 4,611,098 A
• Filed: 12/04/1984
• Issued: 09/09/1986
• Est. Priority Date: 12/04/1984
• Status: Expired due to Fees

• Current Assignee: Paul J. Giorgio, Paul M. Duhaime
• Original Assignee: Paul J. Giorgio, Paul M. Duhaime
• Inventors: Giorgio, Paul J., Duhaime, Paul M.
• Primary Examiner(s): Dwyer, James L.
• Application Number:
  US06/677,945
• Time in Patent Office: 644 Days
• Field of Search: 179/84 C, 179/84 VF, 179/84 SS, 179/84 R, 179/81 R, 179/2 DP, 179/2 A
• US Class Current: 379/373.04
• CPC Class Codes: H04M 1/665 by checking the validity of a code

Abstract

A telephone access system provides to the caller connection to an output upon receipt of a coded signal from the caller. Units are connected in sequence for receipt of each member of the coded signal. The caller has a predetermined period of time to enter the correct code or the system automatically hangs up. The system described uses TOUCH-TONE and all components are state of the art.

Claims

1. A dual tone multiple frequency access system comprising:

input switching means for transmitting a telephone input signal;

operating means connected to said input switching means for receiving said telephone signal, said operating means having a plurality of output terminals with each output terminal connected to represent a different digit from 0 through 9, said operating means also for providing an output signal on selected members of said plurality of output terminals in a sequence that is determinative of the numerical representation of the received telephone input signal;

select switching means including a plurality of select switches in sequential order connected to said operating means output terminal for providing an output signal if signals are received from predetermined members in a predetermined sequence within a predetermined period of time;

relay means having a relay connected to said select switching means and said relay having open contacts connected to said input switching means and adapted to connect to various selected output components, said relay means for closing said open contacts to transmit said telephone input signal through said contacts upon actuation of said relay upon receipt of a signal from said select switching means;

said input switching means further comprises an input switch for transmitting a telephone input signal, sensing means connected to said input switch for providing an output signal upon detection of a ring signal, timing means connected to said sensing means for starting a predetermined timing interval upon receipt of said sensing meansoutput signal, for being stopped from further operation upon operation of said relay means and for inhibiting conduction of said telephone input signal upon expiration of said timing interval when not stopped by said relay means from further operation, ring detect switching means connected to said sensing means for inhibiting transmission of the telephone input signal from said input switch to said sensing means and redirecting said telephone input signal, and OFF/ON hook detecting means connected to said ring detect switching means for receiving the redirected telephone input signal; and

said operating means further comprises phase lock loop and tone decoder means connected to said OFF/ON hook detecting means for receiving said redirected telephone input signal and for providing a plurality of output digital code signal indicative of said redirected telephone input signal, and digital combiner means connected to receive said plurality of output lines for providing an output signal on a predetermined output line wherein the predetermined output line selected is determinative of the numerical value of the digital code received.

2. A dual tone miltiple frequency access system comprising:

input switching means for transmitting a telephone input signal;

operating means connected to said input switching means for receiving said telephone signal, said operating means having a plurality of output terminals with each output terminal connected to represent a different digit from 0 through 9, said operating means also for providing an output signal on selected members of said plurality of output terminals in a sequence that is determinative of the numerical representation of the received telephone input signal;

select switching means including a plurality of select switches in sequential order connected to said operating means output terminals for providing an output signal if signals are received from predetermined members in a predetermined sequence within a predetermined period of time;

relay means having a relay connected to said select switching means and said relay having open contacts connected to said input switching means and adapted to connect to various selected output components, said relay means for closing said open contacts to transmit said telephone input signal through said contacts upon actuation of said relay upon receipt of a signal from said select switching means; and

said operating means further comprises phase lock loop and tone decoder means connected to said input switching means for receiving said telephone input signal and for providing a plurality of output digital code signals indicative of said telephone input signal and, digital combiner means connected to receive said plurality of output lines for providing an output signal on a predetermined output line wherein the predetermined output line selected is determinative of the numerical value of the digital code received.

3. A dual tone multiple frequency access system according to claim 2 wherein said input switching means further comprises timing means for receiving said telephone input signal, for starting a predetermined timing interval upon receipt of said telephone input signal, for being stopped from further operation upon operation of said relay means and for inhibiting conduction of said input signal upon expiration of said timing interval when not stopped by said relay means from further operation.

4. A dual tone multiple frequency access system comprising:

input detecting means for receiving a telephone input signal, said signal input detecting means having a plurality of output terminals with each output terminal connected to represent a different digit from 0 through 9, said input detecting means also for providing an output signal on selected members of said plurality of output terminals in a sequence that is determinative of numerical representation of the received telephone input signal;

select switching means including a plurality of select switches in sequential order connected to said input detecting means output terminals for providing an output signal if signals are received from predetermined members of said input detecting means plurality of output terminals in a predetermined sequence within a predetermined period of time;

relay means having a relay connected to said select switching means and said realy having open contacts connected to said input switching means and adapted to connect to various selected output components, said realy means for closing said open contacts to transmit said telephone input signal through said contacts upon actuation of said relay upon receipt of a signal from said select switching means;

said input detecting means further comprises input switching means for transmitting a telephone input signal and operating means connected to said input switching means for receiving said telephone signal, said operating means having a plurality of output terminals, said operating means providing signals on preselected members of said plurality of output terminals that are determinative of the digital value of the received telephone input signal;

said input switching means further comprises an input switch for transmitting a telephone input signal, sensing means connected to said input switch for providing an output signal upon detection of a ring signal, timing means connected to said sensing means for starting timing upon receipt of said sensing means output signal, for being stopped from further operation upon operation of said relay means and for inhibiting conduction of said telephone input signal upon expiration of said timing interval when not stopped by said relay means from further operation, ring detect switching means connected to said sensing means for inhibiting transmission of the telephone input signal from said input switch to said sensing means and redirecting said telephone input signal, and OFF/ON hook detecting means connected to said ring detect switching means for receiving the redirected telephone input signal; and

said operating means further comprises phase lock loop and tone decoder means connected to said OFF/ON hook detecting means for receiving said redirected telephone input signal and for providing a plurality of output digital code signals indicative of said redirected telephone input signal, and digital combiner means connected to receive said plurality of output lines for providing an output signal on a predetermined output line wherein the predetermined output line selected is determinative of the numerical value of the digital code received.

5. A dual tone multiple frequency access system comprising:

input detecting means for receiving a telephone input signal, said singal input detecting means having a plurality of output terminals with each output terminal connected to represent a different digit from 0 through 9, said input detecting means also providing an output signal on selected members of said plurality of output terminals in a sequence that is determinative of numerical representation of the received telephone input signal;

select switching means including a plurality of select switches in sequential order connected to said input detecting means output terminals for providing an output signal if signals are received from predetermined members of said input detecting means plurality of output terminals in a predetermined seqeunce within a predetermined period of time;

relay means having a relay connected to said select switching means and said relay having open contacts connected to said input switching means and adapted to connect to various selected output components, said relay means for closing said open contacts to transmit said telephone input signal through said contacts upon actuation of said relay upon receipt of a signal from said select switching means;

said input detecting means further comprises input switching means for transmitting a telephone input signal and operating means connected to said input switching means for receiving said telephone signal, said operating means having a plurality of output terminals, said operating means providing signals on preselected members of said plurality of output terminals that are determinative of the digital value of the received telephone input signal; and

said operating means further comprises phase lock loop and tone decoder means connected to said OFF/ON hook detecting means for receiving said redirected telephone input signal and for providing a plurality of output digital code signals indicative of said redirected telephone input signals, and digital combiner means connected to receive said plurality of output lines for providing an output signal on a predetermined output line wherein the predetermined output line selected is determinative of the numerical value of the digital code recieved.