JPS5949046A - 通話音量切替え回路 - Google Patents

通話音量切替え回路

Info

Publication number
JPS5949046A
JPS5949046A JP57159856A JP15985682A JPS5949046A JP S5949046 A JPS5949046 A JP S5949046A JP 57159856 A JP57159856 A JP 57159856A JP 15985682 A JP15985682 A JP 15985682A JP S5949046 A JPS5949046 A JP S5949046A
Authority
JP
Japan
Prior art keywords
transmitter
call
extension
sound volume
resistance
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.)
Granted
Application number
JP57159856A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0153825B2 (enrdf_load_stackoverflow
Inventor
Nobuo Matoba
的場　信夫
Masashi Suzuki
正志 鈴木
Shinichi Sekiguchi
慎一 関口
Takashi Hayashi
隆 林
Sachio Aoyama
青山　佐千男
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP57159856A priority Critical patent/JPS5949046A/ja
Publication of JPS5949046A publication Critical patent/JPS5949046A/ja
Publication of JPH0153825B2 publication Critical patent/JPH0153825B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP57159856A 1982-09-14 1982-09-14 通話音量切替え回路 Granted JPS5949046A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57159856A JPS5949046A (ja) 1982-09-14 1982-09-14 通話音量切替え回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57159856A JPS5949046A (ja) 1982-09-14 1982-09-14 通話音量切替え回路

Publications (2)

Publication Number Publication Date
JPS5949046A true JPS5949046A (ja) 1984-03-21
JPH0153825B2 JPH0153825B2 (enrdf_load_stackoverflow) 1989-11-15

Family

ID=15702719

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57159856A Granted JPS5949046A (ja) 1982-09-14 1982-09-14 通話音量切替え回路

Country Status (1)

Country Link
JP (1) JPS5949046A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61171296A (ja) * 1985-01-25 1986-08-01 Toshiba Corp ボタン電話装置の通話音声調整方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61171296A (ja) * 1985-01-25 1986-08-01 Toshiba Corp ボタン電話装置の通話音声調整方式

Also Published As

Publication number Publication date
JPH0153825B2 (enrdf_load_stackoverflow) 1989-11-15

Similar Documents

Publication Publication Date Title
US4203009A (en) Unbalanced/balanced converter circuits
US4319093A (en) Transmission bridge for a subscriber set
EP0775430A1 (en) Arrangement for adapting a signal level in a mobile phone
EP0455893A1 (en) Telecommunication line circuit
US4361732A (en) Trunk interface circuit with current compensation
US6144737A (en) Trunk interface circuit having function of battery feed to central office
JPS5949046A (ja) 通話音量切替え回路
US4953200A (en) Private branch exchange capable of discriminating different types of telephone sets connected thereto
CA2019266A1 (en) Burst mode transmitter/receiver unit
US4723280A (en) Constant current line circuit
US4607142A (en) Transformer flux compensation circuit
JPH06205131A (ja) モデムを有する電話装置
JPS6181062A (ja) 局線インタフエイス回路
EP0214472B1 (en) Control circuit for use with electronic attenuators and method for providing a control signal proportional to absolute temperature
JP3005438B2 (ja) スピーチネットワーク回路
KR910001680B1 (ko) 키폰 시스템에 있어서 도어폰 인터페이스회로
JPH07288577A (ja) 電話装置
US4412353A (en) Mixing circuit
EP0271946B1 (en) Telecommunication device and circuits used therein
JPH05199317A (ja) 遠隔通信システム及び給電回路
KR960010068Y1 (ko) 전화기의 송수화 회로
JPH0287753A (ja) ハイブリッド回路
JPH0413690Y2 (enrdf_load_stackoverflow)
JPS6210952A (ja) ボタン電話装置
JPH01141451A (ja) 電話機