US3826876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Message waiting and do-not-disturb
Assignee: Telex Computer Products Inc
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Filing: 1973-04-17
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Granted: 1974-07-30
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Expires: 1993-04-17
Abstract
Abstract A message waiting and do-not-disturb circuit for a PBX in which the line circuit designation automatically forwarded to the number display for each operator position when the operator connects to that line circuit is used to automatically access the one of a plurality of line unit stores associated with the line circuit to monitor the message waiting and do-not-disturb status of the line circuit and permit a changing of this status without need for special dialing.
Inventors
- 👤 K Gueldenpfenning
- 👤 U Pommerening
- 👤 S Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:36
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/42; H04M3/436; H04M3/50; H04M3/53; H04M3/537
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
160 words
In a private automatic branch exchange including a plurality of stations each having a line circuit Associated therewith, at least one operator position circuit capable of being connected to said line circuits, a position store associated with said operator position circuit and common control means for storing in said position store the line number of a line circuit at the time it is connected to said position circuit, a message waiting and do-not-disturb circuit comprising line unit means including a plurality of line units for storing the message waiting and the do-not-disturb status of each line circuit, accessing means responsive to connection of said operator position circuit to a line circuit for reading-out the data stored in the line unit designated by the line number stored in said position store, and first indicator means responsive to the data read-out of said line unit by said accessing means for indicating the message waiting and the do-not-disturb status of said line circuit.
Claim 2
Dependent Claim
160 words
In a private automatic branch exchange including a plurality of stations each having a line circuit Associated therewith, at least one operator position circuit capable of being connected to said line circuits, a position store associated with said operator position circuit and common control means for storing in said position store the line number of a line circuit at the time it is connected to said position circuit, a message waiting and do-not-disturb circuit comprising line unit means including a plurality of line units for storing the message waiting and the do-not-disturb status of each line circuit, accessing means responsive to connection of said operator position circuit to a line circuit for reading-out the data stored in the line unit designated by the line number stored in said position store, and first indicator means responsive to the data read-out of said line unit by said accessing means for indicating the message waiting and the do-not-disturb status of said line circuit.
Claim 3
Dependent Claim
90 words
The combination defined in claim 1, wherein said exchange includes a plurality of operator position circuits, timing means for generating operator time slot signals sequentially enabling said operator position circuits and a plurality of position stores associated with said respective operator position circuits, said accessing means including selector gating means responsive to a monitor pulse generated in said position circuits upon connection thereof to a line circuit and an operator time slot signal for selectively reading-out the line number stored in the position store associated with the operator position circuit.
Claim 4
Dependent Claim
41 words
The combination defined in claim 2, wherein said accessing means further includes decoder means responsive to the line number supplied by said position stores via said selector gating means for enabling the corresponding line unit to read-out the data stored therein.
Claim 5
Dependent Claim
37 words
The combination defined in claim 2, wherein said exchange includes number display means for displaying the number of the line circuits connected to each operator position circuit, said position stores forming part of said number display means.
Claim 6
Dependent Claim
103 words
The combination defined in claim 2, wherein said exchange further includes a line number store and said common control means includes means for storing in said line number store the line number of a line circuit to which another station has requested connection, said line number store being connected to said selector gate means so as to provide the stored line number during one dedicated operator time slot to access the line unit corresponding to the stored line number and means for applying the do-not-disturb status derived from said accessed line unit during said dedicated operator time slot to said common control means.
Claim 7
Dependent Claim
28 words
The combination defined in claim 5, further including means responsive to said common control means during said one dedicated operator time slot for inhibiting said operator position circuits.
Claim 8
Dependent Claim
66 words
The combination defined in claim 2, wherein each line unit includes a first flip-flop for storing the message waiting status of the corresponding line circuit, a second flip-flop for storing the do-not-disturb status of the corresponding line circuit, and first and second gates having inputs connected to said first and second flip-flops, respectively, and outputs connected to a terminal common to all of said line units.
Claim 9
Dependent Claim
53 words
The combination defined in claim 7 wherein said timing means also generates a plurality of signaling time slot signals during each operator time slot signal, said first and second gates in each line unit being enabled by a signal from said accessing means and by different ones of said signaling time slot signals.
Claim 10
Dependent Claim
50 words
The combination defined in claim 8, wherein said line units each further include additional gating means connected to said first and second flip-flops and responsive to a signal from said accessing means and respective ones of said signaling time slot signals for setting and resetting said first and second flip-flops.
Claim 11
Dependent Claim
48 words
The combination defined in claim 9, wherein a plurality of third gAtes are connected to said common terminal of said line units and receive respective operator time slot signals, the outputs of said third gates representing the message waiting and do-not-disturb status stored in said respective line units.
Claim 12
Dependent Claim
28 words
The combination defined in claim 10, wherein each operator position circuit includes status storage means responsive to information in said line units for driving said first indicator means.
Claim 13
Dependent Claim
30 words
The combination defined in claim 2, further including second indicator means at each station connected to a respective line unit for indicating the message waiting and do-not-disturb condition stored therein.
Claim 14
Dependent Claim
108 words
The combination defined in claim 9, further including manually operable means for each operator position circuit to generate respective first and second status change signals, means responsive to the generation of a first or second status change signal for generating a monitor pulse in the operator position circuit to operate said selector gating means during the operator time slot signal of the particular operator position circuit, and comparing means responsive to generation of said first or said second status change signal for applying a selected signaling time slot signal to said line units depending on the information already present in the line unit accessed by said accessing means.
Claim 15
Dependent Claim
67 words
The combination defined in claim 13, wherein said comparing means includes a plurality of gates receiving on one input said first or said second status change signal, on another input the message waiting or do-not-disturb status stored in a particular line unit and on a third input a signaling time slot signal for effecting setting or resetting of the first or second flip-flop in the line unit.
References Cited (Backward Citations)
US3050592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |