FR66525E - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR66525E
FR66525E FR66525DA FR66525E FR 66525 E FR66525 E FR 66525E FR 66525D A FR66525D A FR 66525DA FR 66525 E FR66525 E FR 66525E
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
Other languages
French (fr)
Inventor
Fritz Schmidt
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR66525E publication Critical patent/FR66525E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
    • G07C1/20—Checking timed patrols, e.g. of watchman
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/34—Charging, billing or metering arrangements for private branch exchanges
    • 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

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
FR66525D 1952-02-07 1953-07-30 Improvements to telephone systems Expired FR66525E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1110255X 1952-02-07

Publications (1)

Publication Number Publication Date
FR66525E true FR66525E (en) 1957-03-22

Family

ID=7723574

Family Applications (6)

Application Number Title Priority Date Filing Date
FR1110255D Expired FR1110255A (en) 1952-02-07 1953-01-30 Improvements to telephone systems
FR66524D Expired FR66524E (en) 1952-02-07 1953-07-22 Improvements to telephone systems
FR66525D Expired FR66525E (en) 1952-02-07 1953-07-30 Improvements to telephone systems
FR69353D Expired FR69353E (en) 1952-02-07 1954-11-12 Improvements to telephone systems
FR70406D Expired FR70406E (en) 1952-02-07 1955-03-29 Improvements to telephone systems
FR70411D Expired FR70411E (en) 1952-02-07 1955-11-23 Improvements to telephone systems

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FR1110255D Expired FR1110255A (en) 1952-02-07 1953-01-30 Improvements to telephone systems
FR66524D Expired FR66524E (en) 1952-02-07 1953-07-22 Improvements to telephone systems

Family Applications After (3)

Application Number Title Priority Date Filing Date
FR69353D Expired FR69353E (en) 1952-02-07 1954-11-12 Improvements to telephone systems
FR70406D Expired FR70406E (en) 1952-02-07 1955-03-29 Improvements to telephone systems
FR70411D Expired FR70411E (en) 1952-02-07 1955-11-23 Improvements to telephone systems

Country Status (1)

Country Link
FR (6) FR1110255A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358067A1 (en) * 1976-07-08 1978-02-03 Ericsson Telefon Ab L M Monitoring signal routes in telephone networks - uses cyclic distribution of sinusoidal wave over network and synchronous sampling of exchange outputs

Also Published As

Publication number Publication date
FR69353E (en) 1958-11-06
FR66524E (en) 1957-03-22
FR70406E (en) 1959-05-06
FR1110255A (en) 1956-02-10
FR70411E (en) 1959-05-06

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