JPS5778322A - Safety circuit for telephone subscriber - Google Patents

Safety circuit for telephone subscriber

Info

Publication number
JPS5778322A
JPS5778322A JP15307280A JP15307280A JPS5778322A JP S5778322 A JPS5778322 A JP S5778322A JP 15307280 A JP15307280 A JP 15307280A JP 15307280 A JP15307280 A JP 15307280A JP S5778322 A JPS5778322 A JP S5778322A
Authority
JP
Japan
Prior art keywords
safety circuit
telephone subscriber
subscriber
telephone
safety
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
JP15307280A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6258221B2 (enExample
Inventor
Chiyuki Nakamura
Tsunehisa Toukawa
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
Hakusan Seisakusho Co Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Hakusan Seisakusho 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 Nippon Telegraph and Telephone Corp, Hakusan Seisakusho Co Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15307280A priority Critical patent/JPS5778322A/ja
Publication of JPS5778322A publication Critical patent/JPS5778322A/ja
Publication of JPS6258221B2 publication Critical patent/JPS6258221B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Structure Of Telephone Exchanges (AREA)
JP15307280A 1980-10-31 1980-10-31 Safety circuit for telephone subscriber Granted JPS5778322A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15307280A JPS5778322A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15307280A JPS5778322A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Publications (2)

Publication Number Publication Date
JPS5778322A true JPS5778322A (en) 1982-05-17
JPS6258221B2 JPS6258221B2 (enExample) 1987-12-04

Family

ID=15554363

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15307280A Granted JPS5778322A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Country Status (1)

Country Link
JP (1) JPS5778322A (enExample)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4860507A (enExample) * 1971-11-27 1973-08-24
JPS55117429A (en) * 1979-02-28 1980-09-09 Shiroyama Seisakusho Kk Safety circuit for telephone subscriber

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4860507A (enExample) * 1971-11-27 1973-08-24
JPS55117429A (en) * 1979-02-28 1980-09-09 Shiroyama Seisakusho Kk Safety circuit for telephone subscriber

Also Published As

Publication number Publication date
JPS6258221B2 (enExample) 1987-12-04

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