US3922491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telecommunication plant in which a wide-band channel if wanted is connected by the side of a telephone connection
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1973-12-13
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Granted: 1975-11-25
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Expires: 1993-12-13
Abstract
Abstract In a telecommunication system, a wide-band channel when desired is connected next to a telephone connection by a system which comprises a first line system intended for telephone traffic and a second line system with wide-band communication channels intended for data transmission, picture transmission, etc. At least some subscribers have a special apparatus for wide-band connections and an apparatus attachment by the side of a subscriber''s telephone. The high operating costs for a wide-band connection requires that the connection not be established before it is actually to be used and that it be released after use without the telephone connection being disconnected and restored. Thus, a picture transmission can be connected and disconnected several times during a telephone call but it is inconvenient to send a subscriber''s telephone number each time, and no changes in the telephone exchange can be accepted. According to the invention each of such subscribers has at least one change-over switch in his apparatus attachment under control of the subscriber. When a wide-band connection is required between the two parties in an arranged telephone connection, each of the parties operates his change-over switch which causes a call to a control center and the setting of a signal connection. There is also initiated a signal interchange between the subscriber''s equipments via the arranged telephone connection utilized by the control center for connecting the special apparatus of the subscribers via a wide-band connection.
Inventors
- 👤 Harold John Carl Bjork
- 👤 Torben Erik Caroc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:30
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
449 words
An automatic telephone plant for connecting a calling subscriber to a called subscriber comprising: a first line system for voice telephone traffic having a first subscriber line, a second subscriber line and a telephone exchange actively connecting said first subscriber line to said second subscriber line; a second line system for wideband telesignal traffic having a fIrst control signal line, a second control signal line, a cable having at least one wideband communications channel, and a switching center connected to said first and second control signal lines; a first subscriber station comprising: a first subscriber telephone, a first wideband communications apparatus, and a first apparatus attachment, said first apparatus attachment comprising first connecting means for connecting said first subscriber line to said first subscriber telephone, a first control means having a control signal input responsive to a wideband connection control signal for connecting said wideband communications channel to said first wideband communications apparatus, and a first switch means including means when operated for connecting said first subscriber line to the control signal input of said first control means and to said first control signal line; a second subscriber station comprising: a second subscriber telephone, a second wideband communications apparatus, and a second apparatus attachment, said second apparatus attachment comprising second connecting means for connecting said second subscriber line to said second subscriber telephone, a second control means having a control signal input responsive to said wideband connection control signal for connecting said wideband communications channel to said second wideband communications apparatus and a second switch means including means when operated for connecting said second subscriber line to the control signal input of said second control means and to said second control signal line; said switching center including means responsive through said first control signal line to the operation of said first switch means for generating a tone signal for transmission via said first control signal line, said first switch means, said first subscriber line, said telephone exchange, said second subscriber line and said second connecting means to said second subscriber telephone, and including means responsive through said second control signal line to the operation of said second switch means after the operation of said first switch means for generating said wideband connection control signal for transmission via said second control signal line to said second switch means and the control signal input of said second control means, and also from said second switch means via said second subscriber line, said telephone exchange, said first subscriber line, said first switch means to the control signal input of said first control means whereby said first and second wideband communications apparatuses are connected to the one wideband communications channel of said cable.
Claim 2
Dependent Claim
449 words
An automatic telephone plant for connecting a calling subscriber to a called subscriber comprising: a first line system for voice telephone traffic having a first subscriber line, a second subscriber line and a telephone exchange actively connecting said first subscriber line to said second subscriber line; a second line system for wideband telesignal traffic having a fIrst control signal line, a second control signal line, a cable having at least one wideband communications channel, and a switching center connected to said first and second control signal lines; a first subscriber station comprising: a first subscriber telephone, a first wideband communications apparatus, and a first apparatus attachment, said first apparatus attachment comprising first connecting means for connecting said first subscriber line to said first subscriber telephone, a first control means having a control signal input responsive to a wideband connection control signal for connecting said wideband communications channel to said first wideband communications apparatus, and a first switch means including means when operated for connecting said first subscriber line to the control signal input of said first control means and to said first control signal line; a second subscriber station comprising: a second subscriber telephone, a second wideband communications apparatus, and a second apparatus attachment, said second apparatus attachment comprising second connecting means for connecting said second subscriber line to said second subscriber telephone, a second control means having a control signal input responsive to said wideband connection control signal for connecting said wideband communications channel to said second wideband communications apparatus and a second switch means including means when operated for connecting said second subscriber line to the control signal input of said second control means and to said second control signal line; said switching center including means responsive through said first control signal line to the operation of said first switch means for generating a tone signal for transmission via said first control signal line, said first switch means, said first subscriber line, said telephone exchange, said second subscriber line and said second connecting means to said second subscriber telephone, and including means responsive through said second control signal line to the operation of said second switch means after the operation of said first switch means for generating said wideband connection control signal for transmission via said second control signal line to said second switch means and the control signal input of said second control means, and also from said second switch means via said second subscriber line, said telephone exchange, said first subscriber line, said first switch means to the control signal input of said first control means whereby said first and second wideband communications apparatuses are connected to the one wideband communications channel of said cable.
Claim 3
Dependent Claim
73 words
The automatic telephone plant of claim 1 wherein said first connecting means is coupled to said first switch means and includes means operative when said first switch means is operated for disconnecting said first subscriber telephone from said first subscriber line and also includes means for reconnecting said first subscriber telephone to said first subscriber line after said first wideband communications apparatus is connected to said one wideband communication channel of said cable.
Claim 4
Dependent Claim
40 words
The automatic telephone plant of claim 1 further comprising means for charging to said first subscriber station the tolls for the connection of said first wideband communications apparatus via said one wideband communications channel to said second wideband communications apparatus.
Claim 5
Dependent Claim
376 words
An automatic telephone plant for connecting a calling subscriber to a called subscriber comprising: a first line system for voice telephone traffic having a first subscriber line, a second subscriber line and a telephone exchange actively connecting said first subscriber line to said second subscriber line; a second line system for wideband telesignal traffic having a first cable, a second cable, each of said cables having a wideband communications channel and means for transmitting control signals, and a switching center conNected to said first and second cables; a first subscriber station comprising: a first subscriber telephone, a first wideband communications apparatus, and a first apparatus attachment, said first apparatus attachment comprising first connecting means for connecting said first subscriber line to said first subscriber telephone, second connecting means for connecting said first cable to said first wideband communications apparatus, and a first switch means including means when operated for activating said first wideband communications apparatus and including means for connecting said first subscriber line to said first cable; a second subscriber station comprising: a second subscriber telephone, a second wideband communications apparatus, and a second apparatus attachment, said second apparatus attachment comprising third connecting means for connecting said second subscriber line to said second subscriber telephone, fourth connecting means for connecting said second cable to said second wideband communications apparatus, and a second switch means including means when operated for activating said second wideband communications apparatus and including means for connecting said second subscriber line to said second cable; and said switching center including first means responsive through said first cable to the operation of said first switch means for registering such fact and for generating a tone signal for transmission via said first cable, said first switch means, said first subscriber line, said telephone exchange, said second subscriber line and said third connecting means to said second subscriber telephone, including second means responsive through said second cable to the operation of said second switch means for registering such fact, and including third means responsive to the tone signal transferred from said second subscriber line to said second cable upon the operation of said second switch means occurring after the operation of said first switch means for actively connecting said first cable to said second cable.
Claim 6
Dependent Claim
376 words
An automatic telephone plant for connecting a calling subscriber to a called subscriber comprising: a first line system for voice telephone traffic having a first subscriber line, a second subscriber line and a telephone exchange actively connecting said first subscriber line to said second subscriber line; a second line system for wideband telesignal traffic having a first cable, a second cable, each of said cables having a wideband communications channel and means for transmitting control signals, and a switching center conNected to said first and second cables; a first subscriber station comprising: a first subscriber telephone, a first wideband communications apparatus, and a first apparatus attachment, said first apparatus attachment comprising first connecting means for connecting said first subscriber line to said first subscriber telephone, second connecting means for connecting said first cable to said first wideband communications apparatus, and a first switch means including means when operated for activating said first wideband communications apparatus and including means for connecting said first subscriber line to said first cable; a second subscriber station comprising: a second subscriber telephone, a second wideband communications apparatus, and a second apparatus attachment, said second apparatus attachment comprising third connecting means for connecting said second subscriber line to said second subscriber telephone, fourth connecting means for connecting said second cable to said second wideband communications apparatus, and a second switch means including means when operated for activating said second wideband communications apparatus and including means for connecting said second subscriber line to said second cable; and said switching center including first means responsive through said first cable to the operation of said first switch means for registering such fact and for generating a tone signal for transmission via said first cable, said first switch means, said first subscriber line, said telephone exchange, said second subscriber line and said third connecting means to said second subscriber telephone, including second means responsive through said second cable to the operation of said second switch means for registering such fact, and including third means responsive to the tone signal transferred from said second subscriber line to said second cable upon the operation of said second switch means occurring after the operation of said first switch means for actively connecting said first cable to said second cable.
Claim 7
Dependent Claim
73 words
The automatic telephone plant of claim 4 wherein said first connecting means is coupled to said first switch means and includes means operative when said first switch means is operated for disconnecting said first subscriber telephone from said first subscriber line and also includes means for reconnecting said first subscriber telephone to said first subscriber line after said wideband communications apparatuses are connected to each other via said cables and said switching center.
Claim 8
Dependent Claim
44 words
The automatic telephone plant of claim 4 further comprising means for charging to said first subscriber station the tolls for the connection of said first wideband communications apparatus via said first and second cables and said switching center to said second wideband communications apparatus.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |