GB1374377A - High capacity paging system - Google Patents

High capacity paging system

Info

Publication number
GB1374377A
GB1374377A GB290573A GB290573A GB1374377A GB 1374377 A GB1374377 A GB 1374377A GB 290573 A GB290573 A GB 290573A GB 290573 A GB290573 A GB 290573A GB 1374377 A GB1374377 A GB 1374377A
Authority
GB
United Kingdom
Prior art keywords
address
switch
signal
transmitter
recorded
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB290573A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of GB1374377A publication Critical patent/GB1374377A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/185—Selective call encoders for paging networks, e.g. paging centre devices
    • H04W88/188—Selective call encoders for paging networks, e.g. paging centre devices using frequency address codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

1374377 Radio signalling MOTOROLA Inc 19 Jan 1973 [7 Feb 1972] 2905/73 Heading H4L In a paging system whose signals contain an address portion followed by an audio information portion, the address portion of each signal is arranged to overlap the information portion of the preceding signal in order to avoid time wastage. The address portions contain two tones preselected by switches 24, 25 from oscillators 23 in the range 65Hz to 250Hz, to which the audio outputs of the paged receivers 17 are made unresponsive. Initial closure of a pressto-talk switch 11 applies a positive potential A at 30 to the first of two monostables 49, 65. These operate in turn to open successively gates 26, 27 which supply one tone and then the other to the transmitter. The same initial closure of switch 11 also applies earth potential to a diode 31 in a control circuit 13 to energize relay 32 and turn on a tape recorder 14. Voice signals at 12 are recorded, and then reproduced after a delay equal to the duration of the twotone address signal, and applied to the transmitter. When the voice input ends, switch 11 is released, and a delay circuit 18 holds the tape recorder operative for at least long enough to complete transmission of the recorded message. If a new address has been set up by 24, 25 during the recording time, switch 11 may be immediately re-operated to permit the new voice signal to be recorded; and the new address tones will be gated by 26, 27 to the transmitter, concurrently with the end of the delayed, previous voice signal.
GB290573A 1972-02-07 1973-01-19 High capacity paging system Expired GB1374377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22419972A 1972-02-07 1972-02-07

Publications (1)

Publication Number Publication Date
GB1374377A true GB1374377A (en) 1974-11-20

Family

ID=22839667

Family Applications (1)

Application Number Title Priority Date Filing Date
GB290573A Expired GB1374377A (en) 1972-02-07 1973-01-19 High capacity paging system

Country Status (7)

Country Link
US (1) US3798545A (en)
JP (1) JPS5411081B2 (en)
AR (1) AR193469A1 (en)
AU (1) AU449604B2 (en)
CA (1) CA997427A (en)
DE (1) DE2305944C3 (en)
GB (1) GB1374377A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973200A (en) * 1972-11-07 1976-08-03 Telefonaktiebolaget L M Ericsson Process for acknowledging calls in a system for wireless staff locators
US4355210A (en) * 1980-09-22 1982-10-19 Midian Electronics, Inc. Sub-miniature tone encoder with automatic number identification
AT411122B (en) * 2001-12-03 2003-09-25 Frequentis Nachrichtentechnik Gmbh METHOD AND COMMUNICATION DEVICE FOR TRANSMITTING MESSAGES

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2038647A (en) * 1934-09-14 1936-04-28 American Telephone & Telegraph Signaling system
FR1015484A (en) * 1946-09-07
US2671166A (en) * 1950-07-01 1954-03-02 Gen Railway Signal Co Radio communications system
US2918524A (en) * 1956-06-15 1959-12-22 Henry M Hume Television program control
US3387101A (en) * 1965-10-20 1968-06-04 William J. Skiles Identifier for two-way mobile transmityters
US3397401A (en) * 1966-05-27 1968-08-13 Hughes Aircraft Co Voice operated communication system
US3467790A (en) * 1967-10-04 1969-09-16 Lanier Electronic Lab Inc Dictation-transcription device
US3581208A (en) * 1968-12-16 1971-05-25 William Buehrle Jr Emergency warning and identification apparatus for two-way radio communication system

Also Published As

Publication number Publication date
AU5184973A (en) 1974-06-20
US3798545A (en) 1974-03-19
AR193469A1 (en) 1973-04-23
JPS5411081B2 (en) 1979-05-11
DE2305944B2 (en) 1974-04-25
JPS4891902A (en) 1973-11-29
CA997427A (en) 1976-09-21
DE2305944C3 (en) 1974-11-21
AU449604B2 (en) 1974-06-20
DE2305944A1 (en) 1973-08-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees