IL46918A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
IL46918A
IL46918A IL46918A IL4691875A IL46918A IL 46918 A IL46918 A IL 46918A IL 46918 A IL46918 A IL 46918A IL 4691875 A IL4691875 A IL 4691875A IL 46918 A IL46918 A IL 46918A
Authority
IL
Israel
Prior art keywords
counter
line
gate
lead
circuitry
Prior art date
Application number
IL46918A
Other languages
English (en)
Other versions
IL46918A0 (en
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of IL46918A0 publication Critical patent/IL46918A0/xx
Publication of IL46918A publication Critical patent/IL46918A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/006—Exchange line circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephone Set Structure (AREA)
IL46918A 1974-03-29 1975-03-25 Key telephone system IL46918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US456372A US3920928A (en) 1974-03-29 1974-03-29 Line control circuit

Publications (2)

Publication Number Publication Date
IL46918A0 IL46918A0 (en) 1975-05-22
IL46918A true IL46918A (en) 1977-02-28

Family

ID=23812501

Family Applications (1)

Application Number Title Priority Date Filing Date
IL46918A IL46918A (en) 1974-03-29 1975-03-25 Key telephone system

Country Status (13)

Country Link
US (1) US3920928A (no)
JP (1) JPS584878B2 (no)
BE (1) BE827130A (no)
CA (1) CA1008983A (no)
CH (1) CH591792A5 (no)
DE (1) DE2513695C2 (no)
ES (1) ES436067A1 (no)
FR (1) FR2266406B1 (no)
GB (1) GB1503792A (no)
IL (1) IL46918A (no)
IT (1) IT1034648B (no)
NL (1) NL7503734A (no)
SE (1) SE410544B (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057693A (en) * 1976-07-28 1977-11-08 Bell Telephone Laboratories, Incorporated Logic control for electronic key telephone line circuit
CA1169597A (en) * 1981-09-11 1984-06-19 Gordon D. Benning Home communications and control system
JPS6078187A (ja) * 1983-10-04 1985-05-02 昭和電工株式会社 埋め戻し用治具
JPS60178685U (ja) * 1984-05-10 1985-11-27 新潟昭和株式会社 貫通部埋め戻し用治具
JPS611787U (ja) * 1984-06-12 1986-01-08 新潟昭和株式会社 埋め戻し治具
DE4219356A1 (de) * 1991-06-14 1992-12-17 Murata Manufacturing Co Sensorschaltkreis fuer eine telefonleitung
JPH0716213B2 (ja) * 1991-11-13 1995-02-22 コムニクス株式会社 電話装置における外線転送装置
US5515423A (en) * 1993-12-03 1996-05-07 Canon Kabushiki Kaisha Two-line telephone controller
TWI431598B (zh) * 2011-06-20 2014-03-21 Ampower Technology Co Ltd 發光二極體驅動系統及使用其的顯示裝置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH415758A (de) * 1964-06-24 1966-06-30 Hasler Ag Verfahren zur Informationssammlung
US3604857A (en) * 1969-07-25 1971-09-14 Bell Telephone Labor Inc Line-oriented key telephone system
US3716674A (en) * 1970-10-15 1973-02-13 Porta Systems Corp Variable timing automatic interrupter circuit for common telephone sender equipment
CA923644A (en) * 1971-06-16 1973-03-27 Ebrahimi Jalal Line circuit for key telephone system
JPS5248441A (en) * 1975-05-28 1977-04-18 Hitachi Ltd Memory system

Also Published As

Publication number Publication date
SE410544B (sv) 1979-10-15
GB1503792A (en) 1978-03-15
IT1034648B (it) 1979-10-10
ES436067A1 (es) 1977-01-01
AU7943575A (en) 1976-09-30
FR2266406A1 (no) 1975-10-24
SE7503144L (no) 1975-09-30
JPS584878B2 (ja) 1983-01-28
CA1008983A (en) 1977-04-19
DE2513695C2 (de) 1983-09-29
DE2513695A1 (de) 1975-10-02
IL46918A0 (en) 1975-05-22
BE827130A (fr) 1975-07-16
JPS50131704A (no) 1975-10-18
FR2266406B1 (no) 1978-02-03
NL7503734A (nl) 1975-10-01
CH591792A5 (no) 1977-09-30
US3920928A (en) 1975-11-18

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