JPS5452408A - Radiotelephone set - Google Patents

Radiotelephone set

Info

Publication number
JPS5452408A
JPS5452408A JP11864177A JP11864177A JPS5452408A JP S5452408 A JPS5452408 A JP S5452408A JP 11864177 A JP11864177 A JP 11864177A JP 11864177 A JP11864177 A JP 11864177A JP S5452408 A JPS5452408 A JP S5452408A
Authority
JP
Japan
Prior art keywords
reception
service
alternation
amplifier
receiver
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
JP11864177A
Other languages
Japanese (ja)
Inventor
Yoshio Masuda
Isao Yoshida
Hideo Takemura
Tadashi Tajo
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP11864177A priority Critical patent/JPS5452408A/en
Publication of JPS5452408A publication Critical patent/JPS5452408A/en
Pending legal-status Critical Current

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  • Transceivers (AREA)

Abstract

PURPOSE: To make an alternation from a hand-free service to a handset service easily by outputting an alarm, by enabling a mobile radio telephone set to detect and discriminate a reception level.
CONSTITUTION: An operator makes a call by way of microphone 7, amplifier 8, variable attenuator 11, transmitter 6, commonuse unit 2, and antenna 1, and monitors a reception signal by way of receiver 3, variable attenuator 10, amplifier 4, and speaker 5. Attenuators 10 and 11, controlled by switch 14 operating corresponding to the levels of the reception signal transmission signal, prevent the howling during a mutual call. Detecting a voltage proportional to the reception level of receiver 3, reception-level detection circuit 15 compares it with a set reference value to make a decision, thereby operating alarm circuit 16 by its output. Consequently, the user makes an alternation from a hand-free service to handset service
COPYRIGHT: (C)1979,JPO&Japio
JP11864177A 1977-10-04 1977-10-04 Radiotelephone set Pending JPS5452408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11864177A JPS5452408A (en) 1977-10-04 1977-10-04 Radiotelephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11864177A JPS5452408A (en) 1977-10-04 1977-10-04 Radiotelephone set

Publications (1)

Publication Number Publication Date
JPS5452408A true JPS5452408A (en) 1979-04-25

Family

ID=14741561

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11864177A Pending JPS5452408A (en) 1977-10-04 1977-10-04 Radiotelephone set

Country Status (1)

Country Link
JP (1) JPS5452408A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564483A (en) * 1979-06-22 1981-01-17 Seiko Epson Corp Platen of thermal printer
JPH0548492A (en) * 1991-08-09 1993-02-26 Uchu Tsushin Kiso Gijutsu Kenkyusho:Kk Transmitter-receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564483A (en) * 1979-06-22 1981-01-17 Seiko Epson Corp Platen of thermal printer
JPS6334834B2 (en) * 1979-06-22 1988-07-12 Seiko Epson Corp
JPH0548492A (en) * 1991-08-09 1993-02-26 Uchu Tsushin Kiso Gijutsu Kenkyusho:Kk Transmitter-receiver

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