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ES369425A1 - Mobile selective calling systems - Google Patents

Mobile selective calling systems

Info

Publication number
ES369425A1
ES369425A1 ES369425A ES369425A ES369425A1 ES 369425 A1 ES369425 A1 ES 369425A1 ES 369425 A ES369425 A ES 369425A ES 369425 A ES369425 A ES 369425A ES 369425 A1 ES369425 A1 ES 369425A1
Authority
ES
Spain
Prior art keywords
frequencies
mobile
tones
sequence
mobiles
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
ES369425A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES369425A1 publication Critical patent/ES369425A1/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
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/028—Selective call decoders using pulse address codes

Landscapes

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

Abstract

and H4L. A radio telephone system in which mobile stations are called using sequences of frequencies or tones, employs at least three frequencies or tones on a single channel to designate the numbers of wanted mobiles, each mobile being designated by a sequence employing two frequencies or tones only. As described the base station which is connected to a wired exchange uses a single calling channel and ten modulation frequencies. The code for each mobile comprises two modulation frequencies transmitted in a characteristic sequence i.e. in start-stop form. Each mobile need only be able to detect those modulation frequencies by which it is designated and to recognize its characteristic sequence. The mobiles are arranged to transmit this sequence to answer or originate a call.
ES369425A 1968-07-12 1969-07-11 Mobile selective calling systems Expired ES369425A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR159037 1968-07-12

Publications (1)

Publication Number Publication Date
ES369425A1 true ES369425A1 (en) 1971-06-01

Family

ID=8652499

Family Applications (1)

Application Number Title Priority Date Filing Date
ES369425A Expired ES369425A1 (en) 1968-07-12 1969-07-11 Mobile selective calling systems

Country Status (5)

Country Link
CH (1) CH496384A (en)
DE (1) DE1934633A1 (en)
ES (1) ES369425A1 (en)
FR (1) FR1587641A (en)
GB (1) GB1270558A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173471A (en) * 1982-04-05 1983-10-12 Mitsubishi Electric Corp Frequency discriminator
GB2122000A (en) * 1982-06-04 1984-01-04 Rexdale Wells Limited Apparatus for use in two way radio systems
SE455902B (en) * 1986-10-20 1988-08-15 Tateco Ab PROCEDURE FOR TRANSFERING INFORMATION IN THE CODED FORM IN A PERSONAL SYSTEM

Also Published As

Publication number Publication date
CH496384A (en) 1970-09-15
DE1934633A1 (en) 1970-01-15
FR1587641A (en) 1970-03-27
GB1270558A (en) 1972-04-12

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