US5257410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Communication device with ISDN interface
Assignee: Motorola Solutions Inc
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Filing: 1991-03-22
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Granted: 1993-10-26
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Expires: 2011-03-22
Abstract
Abstract Briefly, according to the invention, a multi-unit communication device having a transceiver unit 108 and a control unit 104 is provided. The transceiver unit 108 transmits and receives information signals having digital and analog portions. The control unit 104 provides for operator interface to the communication device. The communication between the transceiver unit 108 and the control unit 104 is conducted on a single pair of wires 112 using ISDN format.
Inventors
- 👤 William R. Meszko
- 👤 Graham G. Haddock, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:30
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0428; H04Q11/0435; H04B; H04B1/00; H04B1/38; H04M; H04M1/00; H04M1/253; H04M1/72; H04M1/725
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
194 words
A communication device for receiving a carrier signal modulated with an information signal comprising a voice signal, the device having a plurality of units interconnected via a single pair of wires for communicating information signals and control data signals and comprising: (a) a first unit including; (i) receiver means for receiving the carrier signal and recovering the information signal; (ii) digitizer means for digitizing the voice signal of the recovered information signal; (iii) first processor means for encoding the digitized voice signal and the control data signals to ISDN format; and (iv) means for simultaneously coupling the ISDN formatted signal to the single pair of wires, the means for simultaneously coupling includes means for carrying DC current from the first unit to power the second unit; (b) a second unit, including; (i) second processor means for receiving the ISDN formatted signal from the single pair of wires; (ii) decoder means for decoding the digitized voice signal, and the control data signals of the ISDN formatted signal; and (iii) audio output means for outputting the voice signal; (c) display means coupled to the second unit for displaying the decoded data portions of the information signal.
Claim 2
Dependent Claim
194 words
A communication device for receiving a carrier signal modulated with an information signal comprising a voice signal, the device having a plurality of units interconnected via a single pair of wires for communicating information signals and control data signals and comprising: (a) a first unit including; (i) receiver means for receiving the carrier signal and recovering the information signal; (ii) digitizer means for digitizing the voice signal of the recovered information signal; (iii) first processor means for encoding the digitized voice signal and the control data signals to ISDN format; and (iv) means for simultaneously coupling the ISDN formatted signal to the single pair of wires, the means for simultaneously coupling includes means for carrying DC current from the first unit to power the second unit; (b) a second unit, including; (i) second processor means for receiving the ISDN formatted signal from the single pair of wires; (ii) decoder means for decoding the digitized voice signal, and the control data signals of the ISDN formatted signal; and (iii) audio output means for outputting the voice signal; (c) display means coupled to the second unit for displaying the decoded data portions of the information signal.
Claim 3
Dependent Claim
15 words
The communication device of claim 1, wherein the first unit comprises a mobile radio receiver.
Claim 4
Dependent Claim
16 words
The communication device of claim 1, wherein the second unit comprises a mobile radio control head.
Claim 5
Dependent Claim
19 words
The communication device of claim 1, wherein the audio output means comprises a speaker coupled to the second unit.
Claim 6
Dependent Claim
15 words
The communication device of claim 1, wherein the audio output means comprises a head phone.
Claim 7
Dependent Claim
16 words
The communication device of claim 1, wherein the single pair of wires comprises a twisted pair.
Claim 8
Dependent Claim
16 words
The communication device of claim 1, wherein the single pair of wires comprises a coaxial cable.
Claim 9
Dependent Claim
17 words
The communication device of claim 1, wherein the first processor means comprises standard telephone ISDN chip set.
Claim 10
Dependent Claim
182 words
A radio having at least two functional units communicating to each other via a single pair of wires, the radio comprising: (a) a control unit for controlling the operation of the radio and processing operator's commands and voice signals, the control unit including: (i) first means for accepting operator's commands and voice signals; (ii) second means coupled to the first means for digitizing operator's voice signal; (iii) converter means for converting operator's commands and digitized voice signals to ISDN format; (iv) means for simultaneously coupling ISDN formatted digitized voice and operator's commands to the first end of the single pair of wires, the means for simultaneously coupling includes means for carrying DC current from the first unit to power the second unit; and (b) a radio transmitter coupled to the second end of the single pair of wires for receiving the ISDN formatted signal from the control unit, the radio transmitter comprising: (i) processor means for processing the ISDN formatted commands from the control unit; (ii) converter means for converting digitized operator's voice to analog; (ii) transmitter means for transmitting operator's voice.
Claim 11
Dependent Claim
182 words
A radio having at least two functional units communicating to each other via a single pair of wires, the radio comprising: (a) a control unit for controlling the operation of the radio and processing operator's commands and voice signals, the control unit including: (i) first means for accepting operator's commands and voice signals; (ii) second means coupled to the first means for digitizing operator's voice signal; (iii) converter means for converting operator's commands and digitized voice signals to ISDN format; (iv) means for simultaneously coupling ISDN formatted digitized voice and operator's commands to the first end of the single pair of wires, the means for simultaneously coupling includes means for carrying DC current from the first unit to power the second unit; and (b) a radio transmitter coupled to the second end of the single pair of wires for receiving the ISDN formatted signal from the control unit, the radio transmitter comprising: (i) processor means for processing the ISDN formatted commands from the control unit; (ii) converter means for converting digitized operator's voice to analog; (ii) transmitter means for transmitting operator's voice.
Claim 12
Dependent Claim
12 words
The radio of claim 9, wherein the first means comprises a keyboard.
Claim 13
Dependent Claim
12 words
The radio of claim 9, wherein the first means comprises a microphone.
Claim 14
Dependent Claim
15 words
The radio of claim 9, wherein the transmitter means include means for transmitting digital information.
References Cited (Backward Citations)
US4147984A
Cited
US4637022A
Cited
US4684941A
Cited
US5117219A
Cited
US4884287A
Cited
US4916724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |