JPH0237754B2 - - Google Patents

Info

Publication number
JPH0237754B2
JPH0237754B2 JP57093388A JP9338882A JPH0237754B2 JP H0237754 B2 JPH0237754 B2 JP H0237754B2 JP 57093388 A JP57093388 A JP 57093388A JP 9338882 A JP9338882 A JP 9338882A JP H0237754 B2 JPH0237754 B2 JP H0237754B2
Authority
JP
Japan
Prior art keywords
power outage
relay
telephone
line
power
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
JP57093388A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58210787A (ja
Inventor
Katsumi Fujikawa
Katsura Kosemura
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.)
Kanda Tsushin Kogyo Co Ltd
Original Assignee
Kanda Tsushin Kogyo 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 Kanda Tsushin Kogyo Co Ltd filed Critical Kanda Tsushin Kogyo Co Ltd
Priority to JP9338882A priority Critical patent/JPS58210787A/ja
Publication of JPS58210787A publication Critical patent/JPS58210787A/ja
Publication of JPH0237754B2 publication Critical patent/JPH0237754B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
JP9338882A 1982-06-01 1982-06-01 ボタン電話装置に於ける停電対策方式 Granted JPS58210787A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9338882A JPS58210787A (ja) 1982-06-01 1982-06-01 ボタン電話装置に於ける停電対策方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9338882A JPS58210787A (ja) 1982-06-01 1982-06-01 ボタン電話装置に於ける停電対策方式

Publications (2)

Publication Number Publication Date
JPS58210787A JPS58210787A (ja) 1983-12-08
JPH0237754B2 true JPH0237754B2 (enrdf_load_stackoverflow) 1990-08-27

Family

ID=14080923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9338882A Granted JPS58210787A (ja) 1982-06-01 1982-06-01 ボタン電話装置に於ける停電対策方式

Country Status (1)

Country Link
JP (1) JPS58210787A (enrdf_load_stackoverflow)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5915597B2 (ja) * 1980-07-22 1984-04-10 岩崎通信機株式会社 電話交換装置における停電切換回路

Also Published As

Publication number Publication date
JPS58210787A (ja) 1983-12-08

Similar Documents

Publication Publication Date Title
US3436488A (en) Line circuit for a key telephone system utilizing a single multifunction supervisory relay
US3941943A (en) Privacy circuit for key telephone systems
US3647983A (en) Key system line card circuit
JPS6251018B2 (enrdf_load_stackoverflow)
JPH0237754B2 (enrdf_load_stackoverflow)
CA1129529A (en) Speech channel switching networks suitable for use in combination with electronic key telephone sets
US4252997A (en) Circuit for interfacing non-dial telephone and automatic switch equipment
US3967076A (en) Call denial circuit for key telephone systems
US4041242A (en) Telephone signalling system having interruption preventive means
JPS6337547B2 (enrdf_load_stackoverflow)
US3649772A (en) Line card circuit for a key telephone system
JPH0119487Y2 (enrdf_load_stackoverflow)
JP2961849B2 (ja) 構内交換システム
JP2524882B2 (ja) 通信管理装置
JPH0617398Y2 (ja) 電話交換装置
JP2516363Y2 (ja) 試験台システムの留守番電話接続装置
JPH0420318B2 (enrdf_load_stackoverflow)
JP2742845B2 (ja) 加入者回線試験方式
JP3415384B2 (ja) 回線試験装置
JPH0761105B2 (ja) 加入者用保安器
JPH01251991A (ja) ボタン電話装置
JPS6134309B2 (enrdf_load_stackoverflow)
JPH01296896A (ja) ボタン電話装置
JPS584875B2 (ja) 夜間切替時の局線トランク使用中表示方式
JP2000174928A (ja) 通報装置