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JPS6442964A - Radio telephone set - Google Patents

Radio telephone set

Info

Publication number
JPS6442964A
JPS6442964A JP62200317A JP20031787A JPS6442964A JP S6442964 A JPS6442964 A JP S6442964A JP 62200317 A JP62200317 A JP 62200317A JP 20031787 A JP20031787 A JP 20031787A JP S6442964 A JPS6442964 A JP S6442964A
Authority
JP
Japan
Prior art keywords
level
reception
transmission
circuit
tone volume
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
JP62200317A
Other languages
Japanese (ja)
Inventor
Yuji Ota
Ryoji Kawasaki
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP62200317A priority Critical patent/JPS6442964A/en
Publication of JPS6442964A publication Critical patent/JPS6442964A/en
Pending legal-status Critical Current

Links

Landscapes

  • Transceivers (AREA)

Abstract

PURPOSE:To optimize talking quality by detecting a transmission level and a reception level and controlling them to optimize the level thereby obtaining a radio telephone system having optimum side tone volume and reception tone volume. CONSTITUTION:A transmission level means 31 detecting an output transmission level of a transmission circuit 17 and a reception level means 32 detecting an input reception level of a reception circuit 26 are provided. Moreover, a 1st variable level circuit 34 adjusting the transmission level is inserted in series with the transmission circuit 17 and a 2nd variable level circuit 35 adjusting the reception level is inserted in series with the reception circuit 26. When the 1st and 2nd variable level circuits 34, 35, a processing circuit 33 and a D/A converter 36 are controlled in response to each detection level of the transmission level detection means 31 and the reception level detection means 32. Thus, the transmission level and the reception level are detected respectively and they are controlled to be an optimum level and optimum side tone volume and reception tone volume are obtained to optimize the talking quality.
JP62200317A 1987-08-10 1987-08-10 Radio telephone set Pending JPS6442964A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200317A JPS6442964A (en) 1987-08-10 1987-08-10 Radio telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200317A JPS6442964A (en) 1987-08-10 1987-08-10 Radio telephone set

Publications (1)

Publication Number Publication Date
JPS6442964A true JPS6442964A (en) 1989-02-15

Family

ID=16422298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200317A Pending JPS6442964A (en) 1987-08-10 1987-08-10 Radio telephone set

Country Status (1)

Country Link
JP (1) JPS6442964A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536951U (en) * 1991-10-18 1993-05-18 株式会社ケンウツド Cordless phone
EP0776113A3 (en) * 1995-11-24 1999-03-17 Nokia Mobile Phones Ltd. Telephone handset with a sidetone preventive circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0536951U (en) * 1991-10-18 1993-05-18 株式会社ケンウツド Cordless phone
EP0776113A3 (en) * 1995-11-24 1999-03-17 Nokia Mobile Phones Ltd. Telephone handset with a sidetone preventive circuit
US5946391A (en) * 1995-11-24 1999-08-31 Nokia Mobile Phones Limited Telephones with talker sidetone

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