CA994485A - Off-premises station line circuit for a key telephone system - Google Patents

Off-premises station line circuit for a key telephone system

Info

Publication number
CA994485A
CA994485A CA186,721A CA186721A CA994485A CA 994485 A CA994485 A CA 994485A CA 186721 A CA186721 A CA 186721A CA 994485 A CA994485 A CA 994485A
Authority
CA
Canada
Prior art keywords
telephone system
line circuit
premises station
key telephone
station 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.)
Expired
Application number
CA186,721A
Other languages
English (en)
Other versions
CA186721S (en
Inventor
Stephen E. Kerman
Kazuaki Matsuo
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.)
Nippon Tsushin Kogyo KK
Tie Communications Inc
Original Assignee
Nippon Tsushin Kogyo KK
Tie Communications Inc
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 Nippon Tsushin Kogyo KK, Tie Communications Inc filed Critical Nippon Tsushin Kogyo KK
Application granted granted Critical
Publication of CA994485A publication Critical patent/CA994485A/en
Expired legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
CA186,721A 1973-04-05 1973-11-26 Off-premises station line circuit for a key telephone system Expired CA994485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US348279A US3920902A (en) 1973-04-05 1973-04-05 Off-premises station line circuit for a key telephone system

Publications (1)

Publication Number Publication Date
CA994485A true CA994485A (en) 1976-08-03

Family

ID=23367344

Family Applications (1)

Application Number Title Priority Date Filing Date
CA186,721A Expired CA994485A (en) 1973-04-05 1973-11-26 Off-premises station line circuit for a key telephone system

Country Status (3)

Country Link
US (1) US3920902A (enExample)
JP (1) JPS5325761B2 (enExample)
CA (1) CA994485A (enExample)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4185173A (en) * 1976-10-01 1980-01-22 Nippon Tsu Shin Kogyo K.K. Key telephone call signalling circuit
JPS5412011A (en) * 1977-06-30 1979-01-29 Nissan Motor Co Ltd Intake-air amount detecting apparatus for internal combustion engine
CA1200036A (en) * 1978-03-13 1986-01-28 Guido Panizzon Partyline subscriber interface circuit
US4220827A (en) * 1979-02-21 1980-09-02 Bell Telephone Laboratories, Incorporated Telephone signaling circuit
US4216356A (en) * 1979-02-21 1980-08-05 Bell Telephone Laboratories, Incorporated Telephone having separate voice and signaling pairs
JPS58114197U (ja) * 1982-01-28 1983-08-04 松下電器産業株式会社 バスユニツト
US4572928A (en) * 1982-11-09 1986-02-25 Tamura Electric Works, Ltd. Key telephone system
US6229885B1 (en) 1997-10-10 2001-05-08 At&T Wireless Svcs. Inc. Method for providing remote emulation of the functionality of a private exchange

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458262A (en) * 1946-01-30 1949-01-04 Automatic Elect Lab Relay selector circuit arranged to simultaneously test a selected group of trunks
BE486836A (enExample) * 1948-01-16
US2814675A (en) * 1956-02-13 1957-11-26 Frank R Mallalieu Intercommunicating telephone equipment
US3535461A (en) * 1967-12-15 1970-10-20 Stromberg Carlson Corp Busy detector circuit for step-by-step telephone exchange
US3521004A (en) * 1968-07-05 1970-07-21 Northern Electric Co Self-steering switching system
US3604857A (en) * 1969-07-25 1971-09-14 Bell Telephone Labor Inc Line-oriented key telephone system
US3665112A (en) * 1969-08-25 1972-05-23 North Electric Co Multi-line telephone set with switching capability
US3701855A (en) * 1971-01-18 1972-10-31 Bell Telephone Labor Inc First idle line pickup service

Also Published As

Publication number Publication date
US3920902A (en) 1975-11-18
JPS5012906A (enExample) 1975-02-10
JPS5325761B2 (enExample) 1978-07-28

Similar Documents

Publication Publication Date Title
CA1026827A (en) Radio telephone system
CA978480A (en) Loudspeaking telephone station circuit
CA1024279A (en) Electronic time-division-multiplexed pabx telephone system
CA973984A (en) Telephone looptest system
CA1002637A (en) Automatic exclusion circuit for a key telephone set
CA988976A (en) Line protector for a communication circuit
AU8338475A (en) Signal coding for telephone communication system
AU500733B2 (en) Multistation telephone switching system
CA984957A (en) Terminal equipment for a synchronized communication system
AU7613574A (en) Subscriber stations for telephone systems
CA994485A (en) Off-premises station line circuit for a key telephone system
CA923644A (en) Line circuit for key telephone system
CA926527A (en) Line circuit for a key telephone system
CA1033484A (en) Key telephone system for subscribers
CA992228A (en) Key telephone line circuit
CA1003982A (en) Multifrequency dialing signal receiver for push-button type telephone systems
CA1000392A (en) Disconnect circuit for telephone systems
CA991765A (en) Pulse-correcting system for a telephone signaling system
CA971292A (en) Tone keying circuit for telephone inband signaling system
CA929290A (en) Line circuit for a key telephone system
CA988636A (en) Line card circuit for a key telephone system
CA1010166A (en) Key telephone system
CA997874A (en) Signal interrupter circuit for a key telephone system
CA1003585A (en) Line card circuit for a key telephone system
CA951844A (en) Centralized network for a telephone station system