JPH0223079B2 - - Google Patents

Info

Publication number
JPH0223079B2
JPH0223079B2 JP56015146A JP1514681A JPH0223079B2 JP H0223079 B2 JPH0223079 B2 JP H0223079B2 JP 56015146 A JP56015146 A JP 56015146A JP 1514681 A JP1514681 A JP 1514681A JP H0223079 B2 JPH0223079 B2 JP H0223079B2
Authority
JP
Japan
Prior art keywords
speaker
button telephone
button
wiring
telephone
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.)
Expired - Lifetime
Application number
JP56015146A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57129565A (en
Inventor
Michio Mito
Akira Shinoi
Masaki Ogawa
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 JP1514681A priority Critical patent/JPS57129565A/ja
Priority to GB8201710A priority patent/GB2093313B/en
Publication of JPS57129565A publication Critical patent/JPS57129565A/ja
Publication of JPH0223079B2 publication Critical patent/JPH0223079B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • H04Q3/0012—Selecting arrangements using relay selectors in the switching stages in which the relays are arranged in a matrix configuration

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP1514681A 1981-02-04 1981-02-04 Key telephone system Granted JPS57129565A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1514681A JPS57129565A (en) 1981-02-04 1981-02-04 Key telephone system
GB8201710A GB2093313B (en) 1981-02-04 1982-01-21 Key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1514681A JPS57129565A (en) 1981-02-04 1981-02-04 Key telephone system

Publications (2)

Publication Number Publication Date
JPS57129565A JPS57129565A (en) 1982-08-11
JPH0223079B2 true JPH0223079B2 (en]) 1990-05-22

Family

ID=11880658

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1514681A Granted JPS57129565A (en) 1981-02-04 1981-02-04 Key telephone system

Country Status (2)

Country Link
JP (1) JPS57129565A (en])
GB (1) GB2093313B (en])

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58195393A (ja) * 1982-05-10 1983-11-14 Nec Corp ボタン電話装置
GB2157130B (en) * 1984-03-30 1987-12-09 Lake Electronic Tech Telephone apparatus
GB2320850B (en) * 1996-11-29 1999-03-10 Samsung Electronics Co Ltd Automatic call designation in key telephone exchange
JP3678159B2 (ja) 2001-03-23 2005-08-03 株式会社デンソー 熱交換器

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51108504A (ja) * 1975-03-19 1976-09-25 Tokyo Shibaura Electric Co Kakuseidenwasochi
JPS5915174Y2 (ja) * 1978-05-19 1984-05-04 日本通信工業株式会社 主装置と端末機関における音声周波信号、電力およびデジタルパルス伝送回路

Also Published As

Publication number Publication date
JPS57129565A (en) 1982-08-11
GB2093313B (en) 1984-10-24
GB2093313A (en) 1982-08-25

Similar Documents

Publication Publication Date Title
US3904834A (en) Handsfree loudspeaking key telephone set and a switching circuit for use in a microphone and loudspeaker equipped key telephone
US4412102A (en) Key telephone system
JPH0223079B2 (en])
JPH03501674A (ja) 個人信号発信電話機
JP2693444B2 (ja) ドアホン
JP2710122B2 (ja) 通信制御装置
JPH0358654A (ja) 電話機
JPS644717B2 (en])
JPS5928318B2 (ja) 分散制御形ボタン電話機
JP2793202B2 (ja) 電話機
JPS6322752B2 (en])
JPS63263994A (ja) 電話装置
JP2586722Y2 (ja) 電話機
JP2844034B2 (ja) Ｉｓｄｎデジタル電話装置
JPS6338355A (ja) 複数選択信号連続発信機能付多機能電話機
JPS61240742A (ja) 電話機付属装置
JPH0429453A (ja) 転送コントローラー
JPS633545A (ja) 保留機能付電話機
JPS631231A (ja) ドアホン装置
JPS60107996A (ja) 保留中の保留者への音声呼出方式
JPS63233650A (ja) 有線端末装置
JPH01147993A (ja) ボタン電話装置
JPS63252090A (ja) 電話装置
JPS5856595A (ja) キ−テレホン装置
JPH04311136A (ja) 指定時刻発呼機能付電話機