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AU505083B2 - Trunk barring detector - Google Patents
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AU505083B2 - Trunk barring detector - Google Patents

Trunk barring detector

Info

Publication number
AU505083B2
AU505083B2 AU22654/77A AU2265477A AU505083B2 AU 505083 B2 AU505083 B2 AU 505083B2 AU 22654/77 A AU22654/77 A AU 22654/77A AU 2265477 A AU2265477 A AU 2265477A AU 505083 B2 AU505083 B2 AU 505083B2
Authority
AU
Australia
Prior art keywords
barring
trunk
detector
trunk barring
barring detector
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
AU22654/77A
Other versions
AU2265477A (en
Inventor
J. W Gallagher
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Standard Telephone and Cables PLC
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 Standard Telephone and Cables Pty Ltd, Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables Pty Ltd
Priority to AU22654/77A priority Critical patent/AU505083B2/en
Publication of AU2265477A publication Critical patent/AU2265477A/en
Application granted granted Critical
Publication of AU505083B2 publication Critical patent/AU505083B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/38—Graded-service arrangements, i.e. some subscribers prevented from establishing certain connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
AU22654/77A 1976-03-02 1976-03-02 Trunk barring detector Expired AU505083B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU22654/77A AU505083B2 (en) 1976-03-02 1976-03-02 Trunk barring detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU22654/77A AU505083B2 (en) 1976-03-02 1976-03-02 Trunk barring detector

Publications (2)

Publication Number Publication Date
AU2265477A AU2265477A (en) 1978-08-31
AU505083B2 true AU505083B2 (en) 1979-11-08

Family

ID=3711842

Family Applications (1)

Application Number Title Priority Date Filing Date
AU22654/77A Expired AU505083B2 (en) 1976-03-02 1976-03-02 Trunk barring detector

Country Status (1)

Country Link
AU (1) AU505083B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU587766B3 (en) * 1988-10-13 1989-08-01 Alan Lionel Sturdy Access barring device for time charged telephone calls

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU587766B3 (en) * 1988-10-13 1989-08-01 Alan Lionel Sturdy Access barring device for time charged telephone calls

Also Published As

Publication number Publication date
AU2265477A (en) 1978-08-31

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