JPS5616387A - Selective calling system - Google Patents

Selective calling system

Info

Publication number
JPS5616387A
JPS5616387A JP9285379A JP9285379A JPS5616387A JP S5616387 A JPS5616387 A JP S5616387A JP 9285379 A JP9285379 A JP 9285379A JP 9285379 A JP9285379 A JP 9285379A JP S5616387 A JPS5616387 A JP S5616387A
Authority
JP
Japan
Prior art keywords
transmitted
transmission line
signal
station
selective
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.)
Pending
Application number
JP9285379A
Other languages
Japanese (ja)
Inventor
Toshiyuki Morita
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP9285379A priority Critical patent/JPS5616387A/en
Publication of JPS5616387A publication Critical patent/JPS5616387A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Abstract

PURPOSE:To secure an assured selective calling for the desired end office in the selective calling system using the delta modulation system, by transmitting the pattern signal having n units of continuous ''1'' to the transmission line. CONSTITUTION:With push of calling key 29-A for channel selection at station A, the pattern signal for selective call of station B which is generated from pulse/pattern generator 20-A and has b units of continuous ''1'' is transmitted to down-transmission line C. Thus station B knows the selective call given to itselt, and then the answer signal is generated from telephone set 1-B. This answer signal is then coded into the modulation code of the delta modulation (DELTAM) system through coder 2-B to be transmitted to up-transmission line D. Then the answer signal is decoded by decoder 21-A to be transmitted to telephone set 1-A. As a result, key 29-A is released to turn on AND circuit 27-A. And the aural signal of telephone 1-A is modulated to the code for DELTAM through coder 2-A and then transmitted to transmission line C.
JP9285379A 1979-07-20 1979-07-20 Selective calling system Pending JPS5616387A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9285379A JPS5616387A (en) 1979-07-20 1979-07-20 Selective calling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9285379A JPS5616387A (en) 1979-07-20 1979-07-20 Selective calling system

Publications (1)

Publication Number Publication Date
JPS5616387A true JPS5616387A (en) 1981-02-17

Family

ID=14065978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9285379A Pending JPS5616387A (en) 1979-07-20 1979-07-20 Selective calling system

Country Status (1)

Country Link
JP (1) JPS5616387A (en)

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