CA1031447A - Circuit de blocage permanent de signal pour systemes de commutation crossbar - Google Patents

Circuit de blocage permanent de signal pour systemes de commutation crossbar

Info

Publication number
CA1031447A
CA1031447A CA205,861A CA205861A CA1031447A CA 1031447 A CA1031447 A CA 1031447A CA 205861 A CA205861 A CA 205861A CA 1031447 A CA1031447 A CA 1031447A
Authority
CA
Canada
Prior art keywords
switching systems
lockout circuit
crossbar switching
permanent signal
signal lockout
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
CA205,861A
Other languages
English (en)
Other versions
CA205861S (en
Inventor
Mark C. Stern
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.)
AT&T Inc
Original Assignee
Western Electric Co 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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA1031447A publication Critical patent/CA1031447A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus
    • H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
CA205,861A 1973-11-05 1974-07-29 Circuit de blocage permanent de signal pour systemes de commutation crossbar Expired CA1031447A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US412635A US3875342A (en) 1973-11-05 1973-11-05 Permanent signal lockout circuit for crossbar switching systems

Publications (1)

Publication Number Publication Date
CA1031447A true CA1031447A (fr) 1978-05-16

Family

ID=23633776

Family Applications (1)

Application Number Title Priority Date Filing Date
CA205,861A Expired CA1031447A (fr) 1973-11-05 1974-07-29 Circuit de blocage permanent de signal pour systemes de commutation crossbar

Country Status (2)

Country Link
US (1) US3875342A (fr)
CA (1) CA1031447A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4358639A (en) * 1980-08-18 1982-11-09 Morin Joseph P Permanent signal holding module
US5559873A (en) * 1994-12-14 1996-09-24 Notify Corporation Telephone privacy device with conference and indicator features

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378642A (en) * 1964-08-10 1968-04-16 Northern Electric Co Line lockout circuit
US3705959A (en) * 1971-05-17 1972-12-12 Bell Telephone Labor Inc Line lockout circuit
US3699265A (en) * 1971-06-15 1972-10-17 Stromberg Carlson Corp Line lockout circuit

Also Published As

Publication number Publication date
US3875342A (en) 1975-04-01

Similar Documents

Publication Publication Date Title
CA1016244A (en) Switching circuit
CA977800A (en) Circuit breaker system
CA999623A (en) Vacuum circuit breaker assembly
AU476375B2 (en) Switching circuit
CA1010792A (en) Switch interlock circuit
CA942808A (en) Terminal member for circuit interrupter
CA980030A (en) Circuit isolating switching arrangement
CA999034A (en) Vacuum circuit interrupter
CA1032598A (fr) Interrupteur de circuit limiteur de courant
CA1000392A (en) Disconnect circuit for telephone systems
CA1025525A (fr) Circuit de commutation
CA1020638A (fr) Circuit de commutation
CA1004713A (en) Small circuit breaker having large contact separation
AU472969B2 (en) Line circuit in automatic switching system
CA1031042A (fr) Circuit de commutation
CA1011854A (en) Switching circuit for preventing lost calls
AU461676B2 (en) Circuit breaker
AU471158B2 (en) Switching circuit
AU498240B2 (en) Switching element having contacts
CA982690A (en) Solid state switch control circuit
AU492847B2 (en) Switching device having contacts
CA995719A (en) Circuit interrupter with interlocking systems
AU478007B2 (en) Switching circuit
CA1030224A (fr) Circuits de commutation
AU483787B2 (en) Small, circuit breaker having large contact separation