US4538031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Home communications and control system
Assignee: Mitel Knowledge Corp
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Filing: 1982-09-10
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Granted: 1985-08-27
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Expires: 2002-09-10
Abstract
Abstract A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine, and a service lead pair within the building. A special service circuit is connected to the tip and ring lead pair and to the service lead pair. A control unit is also connected to the tip and ring lead pair and the service lead pair for receiving signals over either the tip and ring pair or the service lead pair from a telephone connected to the local line, and for generating a predetermined special service circuit enabling signal on the service lead pair. The enabling signal is received by the special service circuit which implements one or more special services in response thereto. The control unit also applies operating power to the service lead pair. The special services implemented include intercom, paging, tone ringing, etc. The control unit also provides power, control, rapid dialing signals, etc.
Inventors
- 👤 Gordon D. Benning
- 👤 Brian J. Pascas
- 👤 Robert K. Blackhall
- 👤 Paul S. Wilker
- 👤 Graham A. Neathway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:48
CPC Classifications
H; H04; H04M; H04M11/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
155 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a special service circuit for connection to the tip and ring lead pair and the service lead pair, and having a predetermined idling state, (b) a control unit for connection to the tip and ring lead pair and the service lead pair, (c) means in the control unit for receiving signals over either the tip and ring lead pair or the service lead pair, and for generating a predetermined special service circuit enabling signal on the service lead pair, (d) means in the special service circuit for receiving said enabling signal and for implementing one or more special services in response thereto, and (e) means for applying operating power to the service lead pair.
Claim 2
Dependent Claim
155 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a special service circuit for connection to the tip and ring lead pair and the service lead pair, and having a predetermined idling state, (b) a control unit for connection to the tip and ring lead pair and the service lead pair, (c) means in the control unit for receiving signals over either the tip and ring lead pair or the service lead pair, and for generating a predetermined special service circuit enabling signal on the service lead pair, (d) means in the special service circuit for receiving said enabling signal and for implementing one or more special services in response thereto, and (e) means for applying operating power to the service lead pair.
Claim 3
Dependent Claim
52 words
A service circuit as defined in claim 1, in which the special service circuit is adapted to receive the enabling signal which includes a predetermined address, and for implementing said one or more special services in response to reception of said address and an additional predetermined signal portion of said enabling signal.
Claim 4
Dependent Claim
87 words
A service circuit as defined in claim 2, in which the special service circuit includes means for connecting a local telephone set to either the tip and ring lead pair or said service lead pair, means for retaining connection of said telephone set normally to the service lead pair, signalling means for applying a predetermined request for service signal to the service lead pair, and in which the control unit includes means for responsively applying said predetermined special service circuit enabling signal to the service lead pair.
Claim 5
Dependent Claim
47 words
A service circuit as defined in claim 3, in which the special service circuit includes an amplifier and associated speaker for connection to the service lead pair and enabling means for enabling the amplifier upon receipt of said predetermined special service circuit enabling signal including said address.
Claim 6
Dependent Claim
52 words
A service circuit as defined in claim 3, in which the special service circuit includes means for switching connection of the local telephone set to the tip and ring lead pair and enabling means for enabling said switching means upon reception of said predetermined special service circuit enabling signal including said address.
Claim 7
Dependent Claim
47 words
A service circuit as defined in claim 3, in which the special service circuit includes a microphone and associated amplifier for connection to the service lead pair and enabling means for enabling the amplifier upon receipt of said predetermined special service circuit enabling signal including said address.
Claim 8
Dependent Claim
101 words
A service circuit as defined in claim 4, 5 or 6, in which the special service circuit includes a switch comprised of a plurality of switch contacts for generating a local address signal, shift register means connected in a circuit to the service leads for receiving said predetermined special service circuit enabling signal, comparator means for comparing the address included in said enabling signal with the local address signal, and means for generating a switching signal for operating the enabling means upon the comparator means indicating a matching of the address included in said enabling signal with the local address signal.
Claim 9
Dependent Claim
47 words
A service circuit as defined in claim 4, further including means for switching connection of the local telephone set to the tip and ring lead pair and means for enabling said switching means upon reception of a second predetermined special service circuit enabling signal including said address.
Claim 10
Dependent Claim
106 words
A service circuit as defined in claim 8, in which the special service circuit includes a switch comprised of a plurality of switch contacts for generating a local address signal, shift register means connected in a circuit to the service leads for receiving said first and second predetermined special service circuit enabling signals, comparator means for comparing the address included in said enabling signals with the local address signal, and means for generating a first signal for enabling the amplifier and a second signal for operating the switching means upon reception of said first and second predetermined special service circuit enabling signals including said address, respectively.
Claim 11
Dependent Claim
87 words
A service circuit as defined in claim 3, in which the special service circuit includes a first amplifer, a speaker connected to the output of the amplifier, a second amplifier, a microphone connected to the input of the second amplifier, switching means for switching connection of the local telephone set to the tip and ring lead pair, means for enabling the first or second amplifier or operating the switching means upon reception of a first, second or third predetermined special service circuit enabling signal including said address.
Claim 12
Dependent Claim
111 words
A service circuit as defined in claim 10 in which the special service circuit includes a switch comprised of a plurality of switch contacts for generating a local address signal, shift register means connected in a circuit to the service leads for receiving said predetermined special service circuit enabling signal, comparator means for comparing the address of said enabling signal with the local address signal, and means for generating a first signal for enabling the first amplifier, a second signal for enabling the second amplifier, and a third signal for operating the switching means upon reception of said first, second or third predetermined special service circuit enabling signal including said address.
Claim 13
Dependent Claim
49 words
A service circuit as defined in claim 1 or 2, in which the special service circuit includes a relay, means for operating the relay in response to reception of said predetermined service circuit enabling signal, and contact means operated by the relay for control of an external switchable apparatus.
Claim 14
Dependent Claim
35 words
A service circuit as defined in claim 1, 2 or 3, in which the control circuit includes said means for applying operating power to the service lead pair for reception by said special service circuit.
Claim 15
Dependent Claim
195 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a control unit for connection to the local telephone line, (b) a plurality of special service circuits, each including at least an amplifier and a speaker connected thereto, and means for connecting the input of the amplifier to the service lead pair, and means for connecting a local telephone set to the local telephone line, normally to the service lead pair, but switchable to the tip and ring lead pair, and means for generating request for service signals, and (c) means for applying operating power to the service lead pair, (d) the control unit including means for receiving said request for service signals from one special service circuit and for enabling operation of an amplifier in another special service circuit, whereby voice signals spoken into the local telephone set can be carried by the service lead pair to the amplifier of the other special service circuit and be output from the speaker connected thereto.
Claim 16
Dependent Claim
195 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a control unit for connection to the local telephone line, (b) a plurality of special service circuits, each including at least an amplifier and a speaker connected thereto, and means for connecting the input of the amplifier to the service lead pair, and means for connecting a local telephone set to the local telephone line, normally to the service lead pair, but switchable to the tip and ring lead pair, and means for generating request for service signals, and (c) means for applying operating power to the service lead pair, (d) the control unit including means for receiving said request for service signals from one special service circuit and for enabling operation of an amplifier in another special service circuit, whereby voice signals spoken into the local telephone set can be carried by the service lead pair to the amplifier of the other special service circuit and be output from the speaker connected thereto.
Claim 17
Dependent Claim
187 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a control unit for connection to the local telephone line, and (b) a plurality of special service circuits, each including at least a first amplifier, a speaker connected to its output, a second amplifier, a microphone connected to its input, means for connecting a local telephone to the local telephone line, normally to the service lead pair, but switchable to the tip and ring lead pair, and means for generating request for service signals, (c) the control unit including means for receiving said request for service signals from one special service circuit and in response for enabling the second amplifier of one special service circuit and the first amplifier of another special service circuit whereby sounds received by the microphone of the one special service circuit are carried by the service lead pair and amplified and reproduced by the speaker of the other special service circuit.
Claim 18
Dependent Claim
187 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring lead pair continuous with a subscriber's line connected to a remote switching machine and a service lead pair, comprising: (a) a control unit for connection to the local telephone line, and (b) a plurality of special service circuits, each including at least a first amplifier, a speaker connected to its output, a second amplifier, a microphone connected to its input, means for connecting a local telephone to the local telephone line, normally to the service lead pair, but switchable to the tip and ring lead pair, and means for generating request for service signals, (c) the control unit including means for receiving said request for service signals from one special service circuit and in response for enabling the second amplifier of one special service circuit and the first amplifier of another special service circuit whereby sounds received by the microphone of the one special service circuit are carried by the service lead pair and amplified and reproduced by the speaker of the other special service circuit.
Claim 19
Dependent Claim
82 words
A service circuit as defined in claim 14 or 15 including means in each special service circuit for connecting the local telephone to the local telephone line in the event either of the absence of operating power on the service lead pair or the reception by a special service circuit of a predetermined signal, including address, whereby direct outgoing and incoming telephone communication can be made between the local telephone and the tip and ring leads connected to said remote switching machine.
Claim 20
Dependent Claim
137 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring pair continuous with a subscriber's line connected to a remote switching machine, and a local service lead pair, comprising: (a) a first special service circuit connected to the quad telephone conductors to which one or more local telephones are connected, for providing a signal path between said tip and ring pair and said local service lead pair, (b) means including a loudspeaker connected to the first special service circuit, for reproducing a message spoken into a microphone of one of said local telephones and carried by said signal path, and (c) control means connected to the quad telephone conductors for enabling the means including the loudspeaker upon said one of the local telephones going off hook.
Claim 21
Dependent Claim
137 words
A service circuit for a local telephone line in a building wired with quad telephone conductors, including a tip and ring pair continuous with a subscriber's line connected to a remote switching machine, and a local service lead pair, comprising: (a) a first special service circuit connected to the quad telephone conductors to which one or more local telephones are connected, for providing a signal path between said tip and ring pair and said local service lead pair, (b) means including a loudspeaker connected to the first special service circuit, for reproducing a message spoken into a microphone of one of said local telephones and carried by said signal path, and (c) control means connected to the quad telephone conductors for enabling the means including the loudspeaker upon said one of the local telephones going off hook.
Claim 22
Dependent Claim
70 words
A service circuit as defined in claim 17 including a second special service circuit connected to the quad telephone conductors having a microphone, and control means connected to the quad telephone conductors for enabling the second special service circuit and said means including the loudspeaker for causing the reproduction of sounds received in the microphone in said loudspeaker upon reception of a predetermined signal from the first special service circuit.
Claim 23
Dependent Claim
45 words
A service circuit as defined in claim 17 including means in the first special service circuit for connecting a telephone set to the tip and ring pair upon generation of a command signal thereat, to facilitate completion of telephone calls via the remote switching machine.
Claim 24
Dependent Claim
50 words
A service circuit as defined in claim 1, further including a remote control special service circuit connected to the quad telephone conductors, and a control circuit for receiving control signals from the tip and ring leads, and for enabling operation of the remote control special service circuit in respone thereto.
Claim 25
Dependent Claim
37 words
A service circuit as defined in claim 20, including means in the control circuit for terminating incoming telephone calls on the tip and ring leads, and for receiving said control signals from the tip and ring leads.
Claim 26
Dependent Claim
24 words
A service circuit as defined in claim 20, including means in the control circuit for receiving further control signals from the service lead pair.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |