US5230018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication system for activating an optical display in a communication terminal of a communication switching station
Assignee: Siemens AG
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Filing: 1990-09-12
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Granted: 1993-07-20
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Expires: 2010-09-12
Abstract
Abstract A central clock unit has a ring generator for generating ringing signals and a DC voltage source for generating display signals. With the assistance of the central clock unit having a switching unit that is controlled by a central processor unit, either the ringing signals or display signals are transmitted to an analog communication terminal via a ring down line and a line connection unit. Within the line connection unit, a switch is controlled by a ringing-display procedure to generate the desired rhythm of the ringing or display signal. A read/write memory unit within an I/O device is divided into dedicated memory sections to eliminate any delays associated with the control of the ringing-display procedure. The dedicated memory sections are used to store information which is written to or read from the memory by the I/O device and the central processor unit.
Inventors
- 👤 Harald Gericke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:18
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04M; H04M19/00; H04M19/02; H04M3/00; H04M3/02; H04M3/42; H04M3/428; H04M2201/00; H04M2201/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
306 words
A communication system having a communication station, the communication system consisting of: a communication terminal having an optical display; a central processor means for performing transmission-related and safety oriented control and coordination of the communication station; a central clock unit having a ring tone generator, a dc voltage source and a switch means, the central clock unit being connected to a receive a control signal from the central processor means, the control signal being used to switch the switch means to through-connect either a ringing signal from the ring tone generator or a dc voltage from the dc voltage source to a ring down line that is output from the central clock unit; a line connection means connecting to the ringdown line for through-connecting a signal on the ring down line to the communication terminal via a further switch means and analog lines connected to the communication terminal; and an I/O device having a R/W memory, the R/W memory having a first dedicated memory section connected to receive initialization bits from the central processor means and a second dedicated memory section connected to store end information bits generated by the I/O device, the I/O device including means for cyclically scanning the first dedicated memory section to detect the initialization bits, the I/O device and the line connection unit being connected to control through-connection of the signal on the ring down line via the further switch means to the communication terminal in accordance with a ringing-display program that is executed upon detection of the initialization bits, the I/O device including means for storing the end information bits in the second dedicated memory section upon completion of the ringing-display program, the central processor means including further means for cyclically scanning the second dedicated memory section and for storing further initialization bits upon detection of the end information bits.
Claim 2
Dependent Claim
306 words
A communication system having a communication station, the communication system consisting of: a communication terminal having an optical display; a central processor means for performing transmission-related and safety oriented control and coordination of the communication station; a central clock unit having a ring tone generator, a dc voltage source and a switch means, the central clock unit being connected to a receive a control signal from the central processor means, the control signal being used to switch the switch means to through-connect either a ringing signal from the ring tone generator or a dc voltage from the dc voltage source to a ring down line that is output from the central clock unit; a line connection means connecting to the ringdown line for through-connecting a signal on the ring down line to the communication terminal via a further switch means and analog lines connected to the communication terminal; and an I/O device having a R/W memory, the R/W memory having a first dedicated memory section connected to receive initialization bits from the central processor means and a second dedicated memory section connected to store end information bits generated by the I/O device, the I/O device including means for cyclically scanning the first dedicated memory section to detect the initialization bits, the I/O device and the line connection unit being connected to control through-connection of the signal on the ring down line via the further switch means to the communication terminal in accordance with a ringing-display program that is executed upon detection of the initialization bits, the I/O device including means for storing the end information bits in the second dedicated memory section upon completion of the ringing-display program, the central processor means including further means for cyclically scanning the second dedicated memory section and for storing further initialization bits upon detection of the end information bits.
Claim 3
Dependent Claim
29 words
A communication system as recited in claim 1, wherein the information bits indicate which of the ringing signal or the dc voltage is connected to the ring down line.
Claim 4
Dependent Claim
15 words
A communication system as recited in claim 1, wherein the switch means is a relay.
Claim 5
Dependent Claim
16 words
A communication system as recited in claim 1, wherein the further switch means is a relay.
Claim 6
Dependent Claim
16 words
A communication system as recited in claim 1, wherein the switch means is a logic circuit.
Claim 7
Dependent Claim
17 words
A communication system as recited in claim 1, wherein the further switch means is a logic circuit.
Claim 8
Dependent Claim
32 words
A communication terminal as recited in claim 1, wherein the optical display comprises a glow lamp and wherein the glow lamp is connected in parallel with a series connected capacitor and bell.
Claim 9
Dependent Claim
44 words
A communication terminal as recited in claim 7, wherein the glow lamp is activated by a first voltage level and the series connected capacitor and bell are activated by a second voltage level, the first voltage level being greater than the second voltage level.
Claim 10
Dependent Claim
170 words
A communication system for activating an optical display in a communications terminal consisting of: a switch means for switching either a ringing signal or a display signal to a ring down line; central processing means for controlling the switch means and for generating initialization information bits indicative of whether ringing signals or display signals are switched to the ring down line; memory means for storing the initialization bits in a dedicated memory section thereof; scanning means for cyclically scanning the initialization bits stored in the dedicated memory section and for through-connecting at the ring down line to the communications terminal in accordance with a ringing-display program that is executed upon detection of the initialization information bits; and means for writing end information bits into a further dedicated memory section of the memory means after the scanning means has completed processing the ringing-display program, the central processing means further including means for scanning the further dedicated memory section and for storing further initialization bits upon detection of the end information bits.
Claim 11
Dependent Claim
170 words
A communication system for activating an optical display in a communications terminal consisting of: a switch means for switching either a ringing signal or a display signal to a ring down line; central processing means for controlling the switch means and for generating initialization information bits indicative of whether ringing signals or display signals are switched to the ring down line; memory means for storing the initialization bits in a dedicated memory section thereof; scanning means for cyclically scanning the initialization bits stored in the dedicated memory section and for through-connecting at the ring down line to the communications terminal in accordance with a ringing-display program that is executed upon detection of the initialization information bits; and means for writing end information bits into a further dedicated memory section of the memory means after the scanning means has completed processing the ringing-display program, the central processing means further including means for scanning the further dedicated memory section and for storing further initialization bits upon detection of the end information bits.
Claim 12
Dependent Claim
78 words
A communication system for activating an optical display in a communications terminal as recited in claim 9, wherein the switch means comprises: a ring-tone generator having an output as the ringing signal; a DC supply having an output as the display signal; relay means, connected to the ring-tone generator and the DC supply, for through-connecting either the ringing signal or the display signal to the ring down line, the relay means being controllable by the central processing unit.
Claim 13
Dependent Claim
67 words
A communication system for activating an optical display in a communications terminal as recited in claim 9, wherein the central processing means comprises: a microprocessor unit; a central memory unit; an interface unit; an internal data bus connecting the microprocessor unit, the central memory unit and the interface unit to one another, the interface unit providing means for connecting the central processing means to a local bus.
Claim 14
Dependent Claim
79 words
A communication system for activating an optical display in a communications terminal as recited in claim 9, wherein the scanning means comprises: an I/O device having the memory means; and a line connection unit connected to the I/O device, the ring-down line and the communications terminal, the line connection unit having a relay connected to the ring-down line and the communications terminal, the relay means controlled by the ringing-display procedure to through-connect the ring-down line to the communications terminal.
Claim 15
Dependent Claim
37 words
A communication system for activating an optical display in a communications terminal as recited in claim 12, wherein the I/O device and the line connection unit communicate with one another in accordance with a high-data-link-control (HDLC) program.
Claim 16
Dependent Claim
30 words
A communication system for activating an optical display in a communications terminal as recited in claim 9, wherein the means for writing comprises an I/O device having the memory means.
Claim 17
Dependent Claim
86 words
A communication system consisting of: a central processor having a control output signal; a means for switching either a ringing signal or a display signal to a ring down line in response to the control output signal of the central processor; an I/O device connected to the central processor by a local bus; and a line connection unit connected to receive the ring down line from the means for switching and further connected to communicate by means of a high-data-link-control (HDLC) program with the I/O device.
Claim 18
Dependent Claim
86 words
A communication system consisting of: a central processor having a control output signal; a means for switching either a ringing signal or a display signal to a ring down line in response to the control output signal of the central processor; an I/O device connected to the central processor by a local bus; and a line connection unit connected to receive the ring down line from the means for switching and further connected to communicate by means of a high-data-link-control (HDLC) program with the I/O device.
Claim 19
Dependent Claim
31 words
A communication system as recited in claim 15, wherein the I/O device comprises a memory having dedicated memory sections that are accessible to the central processor for storing initialization information bits.
Claim 20
Dependent Claim
47 words
A communication system as recited in claim 15, further comprising a communication terminal connected to the line connection unit, the line connection unit having a switching element provided for switching signals received from the ring down line to the communication terminal in accordance with a ringing-display program.
Claim 21
Dependent Claim
61 words
A communication system as recited in claim 17, wherein the communication terminal comprises: a bell; a capacitor placed in series with the bell to form a series bell/capacitor unit; and a glow discharge lamp connected in parallel with the series bell/capacitor unit, the glow discharge lamp and the series bell/capacitor unit receiving the signals that are switched by the switching element.
Claim 22
Dependent Claim
71 words
A communication terminal as recited in claim 15, wherein the means for switching comprises: a ring-tone generator having an output as the ringing signal; a DC supply having an output as the display signal; relay means, connected to the ring-tone generator and the DC voltage generator, for through-connecting either the ringing signal or the display signal to the ring down line, the relay means being controllable by the central processing unit.
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) | 1996-07-19 | 1997-01-18 | 1997-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-19 | 2001-01-18 | 2001-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-19 | 2005-01-18 | 2005-07-20 | $7700.00 | Window Closed / Lapsed |