JPS5612139A - Press-to-talk calling system of radio telephone set - Google Patents

Press-to-talk calling system of radio telephone set

Info

Publication number
JPS5612139A
JPS5612139A JP8690779A JP8690779A JPS5612139A JP S5612139 A JPS5612139 A JP S5612139A JP 8690779 A JP8690779 A JP 8690779A JP 8690779 A JP8690779 A JP 8690779A JP S5612139 A JPS5612139 A JP S5612139A
Authority
JP
Japan
Prior art keywords
station
calling
signal
called
tone
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
JP8690779A
Other languages
Japanese (ja)
Inventor
Kuniaki Matsuda
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP8690779A priority Critical patent/JPS5612139A/en
Publication of JPS5612139A publication Critical patent/JPS5612139A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Abstract

PURPOSE:To make it possible to start alternate calls smoothly by forcibly placing the telephone set of a called side in the reception state in the 1st period when a caller finishes sending the irreducible minimum of information and then changes transmission over to reception in the simplex working system. CONSTITUTION:With calling signal 1 from the calling station, the key station sends lock signal 2 to the subordinate station and dial tone 3 to the calling station, which sends dial signal 4 with dial tone 3. Then, the key station sends simplex singal tone 5 and further call the called station with calling signal 6 while sending ringing tone 8 to the calling station. Once the called station answers, its answer signal 9 is received by the key station and the circuit where transmitted signal 10 of the calling station is made into received signal 11 at the called station is constituted. Until the caller of the calling station changes the 1st transmission over to reception, the called station is held in the reception state, so that initial information can be transferred.
JP8690779A 1979-07-11 1979-07-11 Press-to-talk calling system of radio telephone set Pending JPS5612139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8690779A JPS5612139A (en) 1979-07-11 1979-07-11 Press-to-talk calling system of radio telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8690779A JPS5612139A (en) 1979-07-11 1979-07-11 Press-to-talk calling system of radio telephone set

Publications (1)

Publication Number Publication Date
JPS5612139A true JPS5612139A (en) 1981-02-06

Family

ID=13899903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8690779A Pending JPS5612139A (en) 1979-07-11 1979-07-11 Press-to-talk calling system of radio telephone set

Country Status (1)

Country Link
JP (1) JPS5612139A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131677A (en) * 1990-03-29 1992-07-21 Toyoda Gosei Co., Ltd. Air bag device
US5186488A (en) * 1989-11-16 1993-02-16 Ikeda Bussan Co., Ltd. Airbag restraint system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186488A (en) * 1989-11-16 1993-02-16 Ikeda Bussan Co., Ltd. Airbag restraint system
US5131677A (en) * 1990-03-29 1992-07-21 Toyoda Gosei Co., Ltd. Air bag device

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