JPH035104B2 - - Google Patents

Info

Publication number
JPH035104B2
JPH035104B2 JP20016381A JP20016381A JPH035104B2 JP H035104 B2 JPH035104 B2 JP H035104B2 JP 20016381 A JP20016381 A JP 20016381A JP 20016381 A JP20016381 A JP 20016381A JP H035104 B2 JPH035104 B2 JP H035104B2
Authority
JP
Japan
Prior art keywords
switch
line
switches
circuit
turned
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
Application number
JP20016381A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58101548A (ja
Inventor
Shiro Enami
Takeo Koinuma
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP20016381A priority Critical patent/JPS58101548A/ja
Publication of JPS58101548A publication Critical patent/JPS58101548A/ja
Publication of JPH035104B2 publication Critical patent/JPH035104B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
JP20016381A 1981-12-14 1981-12-14 呼出信号送出方式 Granted JPS58101548A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20016381A JPS58101548A (ja) 1981-12-14 1981-12-14 呼出信号送出方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20016381A JPS58101548A (ja) 1981-12-14 1981-12-14 呼出信号送出方式

Publications (2)

Publication Number Publication Date
JPS58101548A JPS58101548A (ja) 1983-06-16
JPH035104B2 true JPH035104B2 (enrdf_load_stackoverflow) 1991-01-24

Family

ID=16419831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20016381A Granted JPS58101548A (ja) 1981-12-14 1981-12-14 呼出信号送出方式

Country Status (1)

Country Link
JP (1) JPS58101548A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60182252A (ja) * 1984-02-29 1985-09-17 Hitachi Ltd 応答検出方式

Also Published As

Publication number Publication date
JPS58101548A (ja) 1983-06-16

Similar Documents

Publication Publication Date Title
JPH035104B2 (enrdf_load_stackoverflow)
US4660219A (en) Extension ringing arrangement key telephone system
US3748404A (en) Telephone line circuit embodying a triggerable avalanche device
JPH0326712Y2 (enrdf_load_stackoverflow)
US3985974A (en) Power fail monitor and transfer circuit
JPS646618Y2 (enrdf_load_stackoverflow)
JPS62220095A (ja) 局線トランク回路の地気検出方式
JPH0233419Y2 (enrdf_load_stackoverflow)
JPS6259500B2 (enrdf_load_stackoverflow)
JPH0414817B2 (enrdf_load_stackoverflow)
JPS6314523Y2 (enrdf_load_stackoverflow)
JPH018061Y2 (enrdf_load_stackoverflow)
JPS61112465A (ja) 不在転送呼通知サ−ビス方式
JPS6358420B2 (enrdf_load_stackoverflow)
JPS59161959A (ja) 電話端末機器における復旧装置
JPS61114639A (ja) 電話局線の選択切替装置
JPS6348948A (ja) 自動通報端末装置
JPH08181800A (ja) 電話装置
JPS6141272A (ja) 網制御回路
JPS5999858A (ja) 加入者回路の地絡保護方式
JPS62178095A (ja) 局線トランク回路の極性検出回路
JPH0129119B2 (enrdf_load_stackoverflow)
JPS62108647A (ja) 電話装置
JPS62262550A (ja) ブランチ電話機使用中検出回路
JPS59111450A (ja) 通話電流供給方式