JPS55140352A - Speaker telephone set connecting system - Google Patents

Speaker telephone set connecting system

Info

Publication number
JPS55140352A
JPS55140352A JP4867279A JP4867279A JPS55140352A JP S55140352 A JPS55140352 A JP S55140352A JP 4867279 A JP4867279 A JP 4867279A JP 4867279 A JP4867279 A JP 4867279A JP S55140352 A JPS55140352 A JP S55140352A
Authority
JP
Japan
Prior art keywords
extension
control
speaker
telephone set
operation state
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
JP4867279A
Other languages
English (en)
Other versions
JPS5927555B2 (ja
Inventor
Makoto Yoshimoto
Masato Araki
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP4867279A priority Critical patent/JPS5927555B2/ja
Publication of JPS55140352A publication Critical patent/JPS55140352A/ja
Publication of JPS5927555B2 publication Critical patent/JPS5927555B2/ja
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP4867279A 1979-04-20 1979-04-20 拡声電話機接続方式 Expired JPS5927555B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4867279A JPS5927555B2 (ja) 1979-04-20 1979-04-20 拡声電話機接続方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4867279A JPS5927555B2 (ja) 1979-04-20 1979-04-20 拡声電話機接続方式

Publications (2)

Publication Number Publication Date
JPS55140352A true JPS55140352A (en) 1980-11-01
JPS5927555B2 JPS5927555B2 (ja) 1984-07-06

Family

ID=12809807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4867279A Expired JPS5927555B2 (ja) 1979-04-20 1979-04-20 拡声電話機接続方式

Country Status (1)

Country Link
JP (1) JPS5927555B2 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862957A (ja) * 1981-10-09 1983-04-14 Nippon Telegr & Teleph Corp <Ntt> 内線ハンドフリ−応答回路
JPS59158191A (ja) * 1983-02-26 1984-09-07 Tamura Electric Works Ltd ボタン電話装置
JPH0377575U (ja) * 1990-10-25 1991-08-05

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5862957A (ja) * 1981-10-09 1983-04-14 Nippon Telegr & Teleph Corp <Ntt> 内線ハンドフリ−応答回路
JPS59158191A (ja) * 1983-02-26 1984-09-07 Tamura Electric Works Ltd ボタン電話装置
JPH0377575U (ja) * 1990-10-25 1991-08-05

Also Published As

Publication number Publication date
JPS5927555B2 (ja) 1984-07-06

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