ES414271A1 - Perfeccionamiento en una instalacion de exploracion y de identificacion para un sistema de circulacion electrica. - Google Patents

Perfeccionamiento en una instalacion de exploracion y de identificacion para un sistema de circulacion electrica.

Info

Publication number
ES414271A1
ES414271A1 ES0414271A ES414271A ES414271A1 ES 414271 A1 ES414271 A1 ES 414271A1 ES 0414271 A ES0414271 A ES 0414271A ES 414271 A ES414271 A ES 414271A ES 414271 A1 ES414271 A1 ES 414271A1
Authority
ES
Spain
Prior art keywords
line
calling
circuits
register
scanner
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
ES0414271A
Other languages
English (en)
Spanish (es)
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 Corp
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
Publication of ES414271A1 publication Critical patent/ES414271A1/es
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

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
ES0414271A 1972-05-03 1973-05-02 Perfeccionamiento en una instalacion de exploracion y de identificacion para un sistema de circulacion electrica. Expired ES414271A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24979972A 1972-05-03 1972-05-03

Publications (1)

Publication Number Publication Date
ES414271A1 true ES414271A1 (es) 1976-05-01

Family

ID=22945045

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0414271A Expired ES414271A1 (es) 1972-05-03 1973-05-02 Perfeccionamiento en una instalacion de exploracion y de identificacion para un sistema de circulacion electrica.

Country Status (10)

Country Link
US (1) US3746797A (Direct)
JP (1) JPS5333207B2 (Direct)
BE (1) BE798984A (Direct)
CA (1) CA998150A (Direct)
DE (1) DE2321947A1 (Direct)
ES (1) ES414271A1 (Direct)
FR (1) FR2183172B1 (Direct)
GB (1) GB1426919A (Direct)
IT (1) IT986281B (Direct)
SE (1) SE395997B (Direct)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4039758A (en) * 1973-05-22 1977-08-02 Hitachi, Ltd. Line identifying system of common control type automatic exchange
JPS5068004A (Direct) * 1973-10-16 1975-06-07
US3903374A (en) * 1974-01-09 1975-09-02 Stromberg Carlson Corp Control system for electronic PABX switching matrix
US3967073A (en) * 1975-01-09 1976-06-29 Bell Telephone Laboratories, Incorporated PBX automatic number identification system
US4286118A (en) * 1979-07-02 1981-08-25 Solid State Systems, Inc. Data distribution system for private automatic branch exchange
ZA838877B (en) * 1982-12-02 1984-09-26 Gen Electric Telecommunication exchanges
JPS6253061A (ja) * 1985-09-02 1987-03-07 Nec Corp 不正アクセス防止方法

Also Published As

Publication number Publication date
JPS5333207B2 (Direct) 1978-09-13
US3746797A (en) 1973-07-17
FR2183172A1 (Direct) 1973-12-14
CA998150A (en) 1976-10-05
JPS4956513A (Direct) 1974-06-01
BE798984A (fr) 1973-08-31
SE395997B (sv) 1977-08-29
IT986281B (it) 1975-01-20
FR2183172B1 (Direct) 1982-07-02
GB1426919A (en) 1976-03-03
DE2321947A1 (de) 1973-11-15

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