CA1000880A - Remote test circuit for carrier telephones - Google Patents

Remote test circuit for carrier telephones

Info

Publication number
CA1000880A
CA1000880A CA209,158A CA209158A CA1000880A CA 1000880 A CA1000880 A CA 1000880A CA 209158 A CA209158 A CA 209158A CA 1000880 A CA1000880 A CA 1000880A
Authority
CA
Canada
Prior art keywords
test circuit
remote test
telephones
carrier
carrier telephones
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
CA209,158A
Other languages
English (en)
Other versions
CA209158S (en
Inventor
Lester Q. Krasin
Robert D. Mccallum
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.)
Seismograph Service Corp
Original Assignee
Seismograph Service 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 Seismograph Service Corp filed Critical Seismograph Service Corp
Application granted granted Critical
Publication of CA1000880A publication Critical patent/CA1000880A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/02—Selecting arrangements for multiplex systems for frequency-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Devices For Supply Of Signal Current (AREA)
CA209,158A 1973-10-29 1974-09-13 Remote test circuit for carrier telephones Expired CA1000880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00410745A US3840706A (en) 1973-10-29 1973-10-29 Remote test circuit for carrier telephones

Publications (1)

Publication Number Publication Date
CA1000880A true CA1000880A (en) 1976-11-30

Family

ID=23626041

Family Applications (1)

Application Number Title Priority Date Filing Date
CA209,158A Expired CA1000880A (en) 1973-10-29 1974-09-13 Remote test circuit for carrier telephones

Country Status (8)

Country Link
US (1) US3840706A (ja)
JP (1) JPS5734715B2 (ja)
AR (1) AR206613A1 (ja)
BR (1) BR7408869D0 (ja)
CA (1) CA1000880A (ja)
GB (1) GB1450978A (ja)
IL (1) IL45761A (ja)
OA (1) OA04837A (ja)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299008A (en) * 1976-02-16 1977-08-19 Toshiba Corp Calling signal system
US4045624A (en) * 1976-04-02 1977-08-30 Carrier Telephone Corporation Of America, Inc. Continuous monitoring in carrier telephone systems
US4170722A (en) * 1978-02-17 1979-10-09 Gte Automatic Electric Laboratories, Incorporated Apparatus and method for remote testing of a loop transmission path
JPS55112071A (en) * 1979-02-22 1980-08-29 Nec Corp Dispatching telephone system
US4429391A (en) 1981-05-04 1984-01-31 Bell Telephone Laboratories, Incorporated Fault and error detection arrangement
JPS5854770A (ja) * 1981-09-27 1983-03-31 Sanii Denshi Kk Ｆｍ搬送波式インタ−ホンの通信方式
JPS5863261A (ja) * 1981-10-12 1983-04-15 Nikko Denki Seisakusho:Kk 一斉通話指令装置
US4698501A (en) * 1985-05-16 1987-10-06 Nl Industries, Inc. System for simultaneous gamma-gamma formation density logging while drilling
US5412709A (en) * 1992-06-24 1995-05-02 Charter Leasing Corporation Digital telephone station line controller

Also Published As

Publication number Publication date
JPS5734715B2 (ja) 1982-07-24
IL45761A (en) 1976-11-30
IL45761A0 (en) 1974-12-31
GB1450978A (en) 1976-09-29
BR7408869D0 (pt) 1975-08-26
JPS5075303A (ja) 1975-06-20
AR206613A1 (es) 1976-08-06
AU7341774A (en) 1976-03-25
OA04837A (fr) 1980-10-31
US3840706A (en) 1974-10-08

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