FR1513305A - Monitoring circuit for telecommunications lines, especially telephone lines - Google Patents

Monitoring circuit for telecommunications lines, especially telephone lines

Info

Publication number
FR1513305A
FR1513305A FR75687A FR75687A FR1513305A FR 1513305 A FR1513305 A FR 1513305A FR 75687 A FR75687 A FR 75687A FR 75687 A FR75687 A FR 75687A FR 1513305 A FR1513305 A FR 1513305A
Authority
FR
France
Prior art keywords
lines
monitoring circuit
telecommunications
especially telephone
telephone lines
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
FR75687A
Other languages
French (fr)
Inventor
Otto Baade
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.)
INTERNAT STANDARD ELECTRIC COM
International Standard Electric Corp
Original Assignee
INTERNAT STANDARD ELECTRIC COM
International Standard Electric 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 INTERNAT STANDARD ELECTRIC COM, International Standard Electric Corp filed Critical INTERNAT STANDARD ELECTRIC COM
Application granted granted Critical
Publication of FR1513305A publication Critical patent/FR1513305A/en
Expired 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
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR75687A 1965-09-10 1966-09-08 Monitoring circuit for telecommunications lines, especially telephone lines Expired FR1513305A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST024377 1965-09-10

Publications (1)

Publication Number Publication Date
FR1513305A true FR1513305A (en) 1968-02-16

Family

ID=7460090

Family Applications (1)

Application Number Title Priority Date Filing Date
FR75687A Expired FR1513305A (en) 1965-09-10 1966-09-08 Monitoring circuit for telecommunications lines, especially telephone lines

Country Status (4)

Country Link
BE (1) BE686584A (en)
CH (1) CH443411A (en)
FR (1) FR1513305A (en)
NL (1) NL6612564A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783198A (en) * 1971-03-18 1974-01-01 Gte Automatic Electric Lab Inc Battery reversal detection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3783198A (en) * 1971-03-18 1974-01-01 Gte Automatic Electric Lab Inc Battery reversal detection

Also Published As

Publication number Publication date
NL6612564A (en) 1967-03-13
CH443411A (en) 1967-09-15
BE686584A (en) 1967-03-08

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