JPS55125755A - Alternating current detection system for subscriber line - Google Patents

Alternating current detection system for subscriber line

Info

Publication number
JPS55125755A
JPS55125755A JP3228679A JP3228679A JPS55125755A JP S55125755 A JPS55125755 A JP S55125755A JP 3228679 A JP3228679 A JP 3228679A JP 3228679 A JP3228679 A JP 3228679A JP S55125755 A JPS55125755 A JP S55125755A
Authority
JP
Japan
Prior art keywords
line
trunk
acdt
alternating current
subscriber line
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
JP3228679A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6159583B2 (enrdf_load_stackoverflow
Inventor
Yasuhiro Kondo
Setsuo Takahashi
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
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3228679A priority Critical patent/JPS55125755A/ja
Publication of JPS55125755A publication Critical patent/JPS55125755A/ja
Publication of JPS6159583B2 publication Critical patent/JPS6159583B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
JP3228679A 1979-03-22 1979-03-22 Alternating current detection system for subscriber line Granted JPS55125755A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3228679A JPS55125755A (en) 1979-03-22 1979-03-22 Alternating current detection system for subscriber line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3228679A JPS55125755A (en) 1979-03-22 1979-03-22 Alternating current detection system for subscriber line

Publications (2)

Publication Number Publication Date
JPS55125755A true JPS55125755A (en) 1980-09-27
JPS6159583B2 JPS6159583B2 (enrdf_load_stackoverflow) 1986-12-17

Family

ID=12354712

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3228679A Granted JPS55125755A (en) 1979-03-22 1979-03-22 Alternating current detection system for subscriber line

Country Status (1)

Country Link
JP (1) JPS55125755A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188540A (ja) * 1986-02-14 1987-08-18 Nec Corp リンギング送出方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188540A (ja) * 1986-02-14 1987-08-18 Nec Corp リンギング送出方式

Also Published As

Publication number Publication date
JPS6159583B2 (enrdf_load_stackoverflow) 1986-12-17

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