Patent US3787632A successfully refreshed from Google Patents.
US3787632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic number identification for private telephone exchanges
Assignee: Nortel Networks Ltd
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Filing: 1971-06-28
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Granted: 1974-01-22
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Expires: 1991-06-28
Abstract
Abstract An automatic number identification system for identifying the calling station of a branch telephone exchange and transferring the information via the normal talking path connection through the central office. Briefly, the invention provides for the connection of the calling station to the central office for the dialling of a called number; disconnection of the station after the called number is transmitted to the central office; connection of the calling station identification apparatus to the central office for transmission of the calling station identity; followed by disconnection of the identification apparatus and reconnection of the calling station. Various alternative arrangements are described for adapting the invention to the various switching systems, accounting systems and whether ''''ground'''' or ''''loop'''' start is used.
Inventors
- 👤 C Male
- 👤 J Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:05
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A method of automatically identifying a calling station of a private branch exchange in which each calling station has a unique seven-digit identification number, and using a single line connection, comprising: connecting the calling station to the line connection and transmitting a called number thereover to a central office and simultaneously connecting the calling station to an automatic number identification circuit at the private branch exchange; disconnecting the calling station after transmission of the called number and connecting the automatic number identification circuit to the line connection; transmitting the calling station identification over said line connection and disconnecting the number identification circuit from the line connection after transmission of the calling station identification and reconnecting the calling station to the line connection.
Claim 2
Independent Claim
122 words
A method of automatically identifying a calling station of a private branch exchange in which each calling station has a unique seven-digit identification number, and using a single line connection, comprising: connecting the calling station to the line connection and transmitting a called number thereover to a central office and simultaneously connecting the calling station to an automatic number identification circuit at the private branch exchange; disconnecting the calling station after transmission of the called number and connecting the automatic number identification circuit to the line connection; transmitting the calling station identification over said line connection and disconnecting the number identification circuit from the line connection after transmission of the calling station identification and reconnecting the calling station to the line connection.
Claim 3
Dependent Claim
43 words
The method of claim 1 including storing the identification of the calling station in the identification circuit while the calling station is connected to the line connection and outpulsing the calling number identification when the identification circuit is connected to the line connection.
Claim 4
Dependent Claim
38 words
The method of claim 2 including transmitting a request signal from accounting equipment at the central office on connection of the identification circuit to the line connection, said request signal initiating the outpulsing of the calling station identification.
Claim 5
Dependent Claim
143 words
Apparatus for private branch exchange automatic number identification of a calling station for use with a single line connection, comprising: an automatic number identification circuit at a private branch exchange, said circuit including means for transmitting a signal for identifying the calling station; means for connecting the calling station to the single line connection for transmission of a called number to a central office; means for disconnecting the calling station from the line after transmission of the called numbEr to the central office; means for connecting the number identification circuit to the line for transmission of said signal to identify the calling number to accounting equipment at the central office; and means for disconnecting the number identification circuit from the line after transmission of the identified calling number and for reconnecting the private branch exchange station to the line for normal call progression.
Claim 6
Dependent Claim
143 words
Apparatus for private branch exchange automatic number identification of a calling station for use with a single line connection, comprising: an automatic number identification circuit at a private branch exchange, said circuit including means for transmitting a signal for identifying the calling station; means for connecting the calling station to the single line connection for transmission of a called number to a central office; means for disconnecting the calling station from the line after transmission of the called numbEr to the central office; means for connecting the number identification circuit to the line for transmission of said signal to identify the calling number to accounting equipment at the central office; and means for disconnecting the number identification circuit from the line after transmission of the identified calling number and for reconnecting the private branch exchange station to the line for normal call progression.
Claim 7
Dependent Claim
36 words
Apparatus as claimed in claim 4, said automatic number identification circuit comprising means for storing the calling station identification and means for outpulsing the stored identification on receipt of a request signal from the accounting equipment.
Claim 8
Dependent Claim
39 words
Apparatus as claimed in claim 5, said means for storing the calling station identification comprising a permanent store for storing digits common to all stations of the exchange and means for storing the remaining digits of a calling station.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |