FR944777A - Improvements to telephone systems, in particular for the identification of call lines - Google Patents

Improvements to telephone systems, in particular for the identification of call lines

Info

Publication number
FR944777A
FR944777A FR944777DA FR944777A FR 944777 A FR944777 A FR 944777A FR 944777D A FR944777D A FR 944777DA FR 944777 A FR944777 A FR 944777A
Authority
FR
France
Prior art keywords
identification
telephone systems
call lines
call
lines
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)
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
Application granted granted Critical
Publication of FR944777A publication Critical patent/FR944777A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/13—Gas discharge tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Alarm Systems (AREA)
FR944777D 1946-05-17 1947-04-08 Improvements to telephone systems, in particular for the identification of call lines Expired FR944777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US670358A US2484612A (en) 1946-05-17 1946-05-17 Directory number calling line identifier

Publications (1)

Publication Number Publication Date
FR944777A true FR944777A (en) 1949-04-14

Family

ID=24690099

Family Applications (1)

Application Number Title Priority Date Filing Date
FR944777D Expired FR944777A (en) 1946-05-17 1947-04-08 Improvements to telephone systems, in particular for the identification of call lines

Country Status (5)

Country Link
US (1) US2484612A (en)
BE (1) BE473095A (en)
CH (1) CH277163A (en)
FR (1) FR944777A (en)
GB (1) GB650774A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2629016A (en) * 1942-06-27 1953-02-17 Bell Telephone Labor Inc Automatic toll-ticketing system
US2619545A (en) * 1947-06-13 1952-11-25 Bell Telephone Labor Inc Telephone calling line identification and recording system
US2767246A (en) * 1947-09-04 1956-10-16 Bell Telephone Labor Inc Automatic message accounting system
US2639092A (en) * 1947-09-04 1953-05-19 Bell Telephone Labor Inc Automatic message accounting system
US2570971A (en) * 1947-11-14 1951-10-09 Bell Telephone Labor Inc Vertical line number translator
US2600502A (en) * 1948-04-24 1952-06-17 Bell Telephone Labor Inc Calling line and private branch exchange line identifier
US2639330A (en) * 1949-03-04 1953-05-19 Automatic Elect Lab Calling line identification apparatus
NL81976C (en) * 1949-06-02
US2594505A (en) * 1949-12-09 1952-04-29 Bell Telephone Labor Inc Calling line identification and registering system
BE499901A (en) * 1949-12-30
US2587426A (en) * 1950-04-28 1952-02-26 Atomic Energy Commission Pulse forming network
NL164620B (en) * 1950-10-13 Hoechst Ag PROCESS FOR MANUFACTURING A PROJECTIVE FIBER FIBER COMPOUND BY HOT-SHRINKING, AND DEVICE FOR APPLYING THE PROCESS.
US2851531A (en) * 1952-03-12 1958-09-09 Gen Telephone Lab Inc Automatic telephone systems involving toll recording facilities
US2881260A (en) * 1952-03-12 1959-04-07 Gen Telephone Lab Inc Automatic telephone systems involving toll-recording facilities
US2886642A (en) * 1953-04-13 1959-05-12 Gen Dynamics Corp Automatic toll ticketing
NL107045C (en) * 1953-07-03
US2748283A (en) * 1953-08-19 1956-05-29 Bell Telephone Labor Inc Frequency multiplier apparatus
US3133156A (en) * 1960-10-31 1964-05-12 Bell Telephone Labor Inc Telephone line concentrator

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1690206A (en) * 1927-06-04 1928-11-06 Western Electric Co Telephone system
US1663747A (en) * 1927-08-05 1928-03-27 American Telephone & Telegraph Telephone-exchange system
US1841084A (en) * 1930-04-19 1932-01-12 Bell Telephone Labor Inc Telephone system
US2005595A (en) * 1932-10-21 1935-06-18 Western Electric Co Telephone system
US2226459A (en) * 1935-11-23 1940-12-24 Philco Radio & Television Corp Signal-deriving circuit
US2084105A (en) * 1936-03-11 1937-06-15 Bell Telephone Labor Inc Telephone control system
US2153179A (en) * 1936-09-10 1939-04-04 Ibm Oscillator circuit
NL74027C (en) * 1940-09-20

Also Published As

Publication number Publication date
CH277163A (en) 1951-08-15
BE473095A (en)
GB650774A (en) 1951-03-07
US2484612A (en) 1949-10-11

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