GB2164162B - Telephone line voltage detection circuit - Google Patents

Telephone line voltage detection circuit

Info

Publication number
GB2164162B
GB2164162B GB08422287A GB8422287A GB2164162B GB 2164162 B GB2164162 B GB 2164162B GB 08422287 A GB08422287 A GB 08422287A GB 8422287 A GB8422287 A GB 8422287A GB 2164162 B GB2164162 B GB 2164162B
Authority
GB
United Kingdom
Prior art keywords
detection circuit
voltage detection
telephone line
line voltage
telephone
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
GB08422287A
Other versions
GB8422287D0 (en
GB2164162A (en
Inventor
Dennis William Revell
Terence David Walton
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.)
STC PLC
Original Assignee
STC PLC
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 STC PLC filed Critical STC PLC
Priority to GB08422287A priority Critical patent/GB2164162B/en
Publication of GB8422287D0 publication Critical patent/GB8422287D0/en
Publication of GB2164162A publication Critical patent/GB2164162A/en
Application granted granted Critical
Publication of GB2164162B publication Critical patent/GB2164162B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/155—Indicating the presence of voltage
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB08422287A 1984-09-04 1984-09-04 Telephone line voltage detection circuit Expired GB2164162B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08422287A GB2164162B (en) 1984-09-04 1984-09-04 Telephone line voltage detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08422287A GB2164162B (en) 1984-09-04 1984-09-04 Telephone line voltage detection circuit

Publications (3)

Publication Number Publication Date
GB8422287D0 GB8422287D0 (en) 1984-10-10
GB2164162A GB2164162A (en) 1986-03-12
GB2164162B true GB2164162B (en) 1988-02-10

Family

ID=10566221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08422287A Expired GB2164162B (en) 1984-09-04 1984-09-04 Telephone line voltage detection circuit

Country Status (1)

Country Link
GB (1) GB2164162B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685487B1 (en) * 1991-12-20 1994-09-16 Cit Alcatel DEVICE FOR EVALUATING THE VOLTAGE PROVIDED BY A VOLTAGE SOURCE.

Also Published As

Publication number Publication date
GB8422287D0 (en) 1984-10-10
GB2164162A (en) 1986-03-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920904