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GB2147480B - Telephone subscriber line battery feed resistor arrangements - Google Patents

Telephone subscriber line battery feed resistor arrangements

Info

Publication number
GB2147480B
GB2147480B GB08420054A GB8420054A GB2147480B GB 2147480 B GB2147480 B GB 2147480B GB 08420054 A GB08420054 A GB 08420054A GB 8420054 A GB8420054 A GB 8420054A GB 2147480 B GB2147480 B GB 2147480B
Authority
GB
United Kingdom
Prior art keywords
subscriber line
telephone subscriber
battery feed
line battery
feed resistor
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
GB08420054A
Other versions
GB2147480A (en
GB8420054D0 (en
Inventor
Gyula Jakab
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom 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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of GB8420054D0 publication Critical patent/GB8420054D0/en
Publication of GB2147480A publication Critical patent/GB2147480A/en
Application granted granted Critical
Publication of GB2147480B publication Critical patent/GB2147480B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • H01C7/021—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient formed as one or more layers or coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Thermistors And Varistors (AREA)
GB08420054A 1983-09-30 1984-08-07 Telephone subscriber line battery feed resistor arrangements Expired GB2147480B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000438174A CA1196743A (en) 1983-09-30 1983-09-30 Telephone subscriber line battery feed resistor arrangements

Publications (3)

Publication Number Publication Date
GB8420054D0 GB8420054D0 (en) 1984-09-12
GB2147480A GB2147480A (en) 1985-05-09
GB2147480B true GB2147480B (en) 1986-11-05

Family

ID=4126204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08420054A Expired GB2147480B (en) 1983-09-30 1984-08-07 Telephone subscriber line battery feed resistor arrangements

Country Status (2)

Country Link
CA (1) CA1196743A (en)
GB (1) GB2147480B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4999731A (en) * 1986-08-22 1991-03-12 Northern Telecom Limited Surge protector for telecommunications systems
US5057964A (en) * 1986-12-17 1991-10-15 Northern Telecom Limited Surge protector for telecommunications terminals
DE4143095C1 (en) * 1991-12-27 1993-04-08 Roederstein Spezialfabriken Fuer Bauelemente Der Elektronik Und Kondensatoren Der Starkstromtechnik Gmbh, 8300 Landshut, De Electrical building block, for simplicity and reliability - comprises resistor in series with melt fuse and connection element forming protective wall section, fixed on substrate with silicone adhesive
DE4219304C2 (en) * 1992-06-12 1994-03-31 Roederstein Kondensatoren Reliable overcurrent protection component with a small footprint and simple construction

Also Published As

Publication number Publication date
GB2147480A (en) 1985-05-09
CA1196743A (en) 1985-11-12
GB8420054D0 (en) 1984-09-12

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20040806