JPS5778320A - Safety circuit for telephone subscriber - Google Patents

Safety circuit for telephone subscriber

Info

Publication number
JPS5778320A
JPS5778320A JP15307080A JP15307080A JPS5778320A JP S5778320 A JPS5778320 A JP S5778320A JP 15307080 A JP15307080 A JP 15307080A JP 15307080 A JP15307080 A JP 15307080A JP S5778320 A JPS5778320 A JP S5778320A
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
JP15307080A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6217456B2 (enrdf_load_stackoverflow
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 JP15307080A priority Critical patent/JPS5778320A/ja
Publication of JPS5778320A publication Critical patent/JPS5778320A/ja
Publication of JPS6217456B2 publication Critical patent/JPS6217456B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Structure Of Telephone Exchanges (AREA)
JP15307080A 1980-10-31 1980-10-31 Safety circuit for telephone subscriber Granted JPS5778320A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15307080A JPS5778320A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15307080A JPS5778320A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Publications (2)

Publication Number Publication Date
JPS5778320A true JPS5778320A (en) 1982-05-17
JPS6217456B2 JPS6217456B2 (enrdf_load_stackoverflow) 1987-04-17

Family

ID=15554321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15307080A Granted JPS5778320A (en) 1980-10-31 1980-10-31 Safety circuit for telephone subscriber

Country Status (1)

Country Link
JP (1) JPS5778320A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS6217456B2 (enrdf_load_stackoverflow) 1987-04-17

Similar Documents

Publication Publication Date Title
GB2138654B (en) Telephone switching system
GB2133659B (en) Subscriber line interface circuit
DE3378455D1 (en) Subscriber line interface circuit
CA51085S (en) Telecommunications handset
GB2107554B (en) Telephone line circuit
JPS57101996A (en) Call indication circuit
AU87916S (en) Telephone handset
JPS56145730A (en) Line protecting device for communication circuit
JPS5722322A (en) Line protecting device for communication circuit
IL68359A0 (en) Telephone set
JPS56158592A (en) Telephone set circuit netword
EP0102111A3 (en) Telephone circuit
JPS56156086A (en) Remote unit for telephone set circuit network
GB2073542B (en) Telephone handset
GB2072465B (en) Telephone transmission circuit
JPS5787690A (en) Subscriber circuit
DE3379859D1 (en) Telephone circuit
DE3369048D1 (en) Subscriber telephone system
GB2082421B (en) Telephone exchanges
JPS55117429A (en) Safety circuit for telephone subscriber
JPS5778322A (en) Safety circuit for telephone subscriber
JPS5778321A (en) Safety circuit for telephone subscriber
JPS5778320A (en) Safety circuit for telephone subscriber
GB2075304B (en) Telephone receiving equipment
GB2086185B (en) Telephone re-dial facility