BE743132A - - Google Patents

Info

Publication number
BE743132A
BE743132A BE743132DA BE743132A BE 743132 A BE743132 A BE 743132A BE 743132D A BE743132D A BE 743132DA BE 743132 A BE743132 A BE 743132A
Authority
BE
Belgium
Application number
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 filed Critical
Publication of BE743132A publication Critical patent/BE743132A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H04M1/677—Preventing the dialling or sending of predetermined telephone numbers or selected types of telephone numbers, e.g. long distance numbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Telephonic Communication Services (AREA)
BE743132D 1968-12-18 1969-12-15 BE743132A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78474968A 1968-12-18 1968-12-18

Publications (1)

Publication Number Publication Date
BE743132A true BE743132A (xx) 1970-05-14

Family

ID=25133414

Family Applications (1)

Application Number Title Priority Date Filing Date
BE743132D BE743132A (xx) 1968-12-18 1969-12-15

Country Status (7)

Country Link
US (1) US3573389A (xx)
JP (1) JPS4636362B1 (xx)
BE (1) BE743132A (xx)
DE (1) DE1962950B2 (xx)
FR (1) FR2026471A1 (xx)
GB (1) GB1288917A (xx)
NL (1) NL165017C (xx)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3704346A (en) * 1970-01-28 1972-11-28 Commatic Systems Telephone switching and forwarding system
US3710033A (en) * 1971-06-11 1973-01-09 W Whitney Call forwarding arrangement for telephone systems
US3873781A (en) * 1973-02-16 1975-03-25 Electronic Arrays Prevention of unauthorized use of telephone
CA1019485A (en) * 1974-06-21 1977-10-18 Sed Systems Ltd. Automatic dialing equipment
US4045619A (en) * 1975-03-17 1977-08-30 Aristonics Corporation Telephone control system
US4160130A (en) * 1978-06-20 1979-07-03 Gte Sylvania Incorporated Essential user bypass circuit for telephone switching system
US4336422A (en) * 1978-07-05 1982-06-22 Akzona Incorporated Toll restrictor
US4291199A (en) * 1979-03-28 1981-09-22 Bell Telephone Laboratories, Incorporated Communication system tracking arrangement
DE3011655C2 (de) * 1980-03-26 1982-12-23 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für eine direkt gesteuerte Fernsprechvermittlungsanlage zum zeitweiligen Sperren eines Teilnehmeranschlusses gegen ankommende Verbindungen
DE3013918C2 (de) * 1980-04-11 1982-12-30 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für eine Teilnehmerschaltung für Sonderbedienungsteilnehmer
JPS57196651A (en) * 1981-05-28 1982-12-02 Toshiba Corp Dial inputting system
US4600812A (en) * 1984-11-23 1986-07-15 At&T Information Systems Inc. Communication system having abbreviated dialing access
US4748661A (en) * 1986-02-11 1988-05-31 Pacific Bell Circuit for translating telephone numbers
JPS6339243A (ja) * 1986-08-04 1988-02-19 Canon Inc 通信装置
US4802208A (en) * 1987-05-19 1989-01-31 Inventa Electronics Co., Ltd. Hot-line device for telephone sets
US6301339B1 (en) 1995-11-15 2001-10-09 Data Race, Inc. System and method for providing a remote user with a virtual presence to an office

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206554A (en) * 1962-11-26 1965-09-14 Bell Telephone Labor Inc Information verification circuit
US3334190A (en) * 1964-07-09 1967-08-01 Bell Telephone Labor Inc Centralized repertory system for multifrequency signaling telephones

Also Published As

Publication number Publication date
GB1288917A (xx) 1972-09-13
DE1962950B2 (de) 1971-05-19
NL165017B (nl) 1980-09-15
JPS4636362B1 (xx) 1971-10-26
NL6918916A (xx) 1970-06-22
DE1962950A1 (de) 1970-06-25
FR2026471A1 (xx) 1970-09-18
NL165017C (nl) 1981-02-16
US3573389A (en) 1971-04-06

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