US3676606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camp-on busy checking and monitor circuit
Assignee: Telex Computer Products Inc
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Filing: 1971-03-05
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Granted: 1972-07-11
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Expires: 1991-03-05
Abstract
Abstract Camp-on busy checking and monitor circuit which permits only a single line to camp-on a given line at one time and limits the total number of camp-on connections through use of a memory providing information concerning the lines which are associated with a camp-on connection.
Inventors
- 👤 Klaus Gueldenpfennig
- 👤 Uwe A Pommerening
- 👤 Stanley L Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:47
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/58; H04Q3/62; H04Q3/625
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
154 words
In an automatic private branch exchange including a plurality of trunk circuits, a plurality of line circuits, a plurality of loop circuits, common control means for connecting selected trunks to selected line circuits and capable of establishing a camp-on connection of a trunk to a busy line circuit via a loop circuit, a camp-on monitor and control circuit, comprising: buffer means for storing a designation of a selected line circuit to which a trunk circuit is to be camped-on, storage means for storing in respective storage areas allocated to said loop circuits designations of line circuits associated with a camp-on connection, a comparator connected to the outputs of said buffer means and said storage means for generating a camp-on deny signal upon receipt of identical designations from said buffer means and said storage means, and scanning means responsive to an operator function for sequentially gating the designations in said storage means to said comparator.
Claim 2
Dependent Claim
154 words
In an automatic private branch exchange including a plurality of trunk circuits, a plurality of line circuits, a plurality of loop circuits, common control means for connecting selected trunks to selected line circuits and capable of establishing a camp-on connection of a trunk to a busy line circuit via a loop circuit, a camp-on monitor and control circuit, comprising: buffer means for storing a designation of a selected line circuit to which a trunk circuit is to be camped-on, storage means for storing in respective storage areas allocated to said loop circuits designations of line circuits associated with a camp-on connection, a comparator connected to the outputs of said buffer means and said storage means for generating a camp-on deny signal upon receipt of identical designations from said buffer means and said storage means, and scanning means responsive to an operator function for sequentially gating the designations in said storage means to said comparator.
Claim 3
Dependent Claim
29 words
A system as defined in claim 1, wherein said scanning means gates only those storage areas allocated to loop circuits which are presently associated with a camped-on trunk circuit.
Claim 4
Dependent Claim
117 words
A system as defined in claim 1, wherein said scanning means includes camp-on busy circuit means providing outputs on a plurality of lines indicating those loop circuits which are associated with a trunk circuit in a camped-on condition, camp-on scanner means providing outputs on a plurality of lines allocated to the respective storage areas in said storage means, control gate means responsive to the outputs from said camp-on busy circuit means and said camp-on scanner means for enabling selected ones of a plurality of address lines designating loop circuits associated with a camped-on trunk, and address means responsive to said address lines from said control gate means for sequentially enabling selected storage areas in said storage means.
Claim 5
Dependent Claim
22 words
A system as defined in claim 3, wherein said storage means is provided as a memory providing non-destructive read-out to said comparator.
Claim 6
Dependent Claim
53 words
A system as defined in claim 4, further including input circuit means responsive to a condition in any loop circuit representing initiation of connection of a trunk to a line circuit for generating a check signal, and gating means responsive to receipt of a cheCk signal for initiating operation of said scanning means.
Claim 7
Dependent Claim
30 words
A system as defined in claim 5, wherein said camp-on deny signal generated by said comparator is connected to said gating means to inhibit further operation of said scanning means.
Claim 8
Dependent Claim
89 words
A system as defined in claim 6, wherein said input circuit means provides additional address lines which are selectively enabled by the loop circuit initiating the camp-on check by effecting generation of said check signal and said camp-on scanner means includes a last output line connected to said control gate means for connecting said additional address lines to said address means, to thereby effect transfer of the designation in said buffer means into the storage area of said storage means allocated to said loop circuit initiating the camp-on check.
Claim 9
Dependent Claim
46 words
A system as defined in claim 3, further including camp-on counter means connected to said control gate means for counting the number of loops associated with a camp-on connection during each scan and for generating a camp-on deny signal when said count reaches a predetermined value.
Claim 10
Dependent Claim
22 words
A system as defined in claim 8, wherein said storage means is provided as a memory providing non-destructive read-out to said comparator.
Claim 11
Dependent Claim
53 words
A system as defined in claim 9, further including input circuit means responsive to a condition in any loop circuit representing initiation of connection of a trunk to a line circuit for generating a check signal, and gating means responsive to receipt of a check signal for initiating operation of said scanning means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |