BE464870A - - Google Patents

Info

Publication number
BE464870A
BE464870A BE464870DA BE464870A BE 464870 A BE464870 A BE 464870A BE 464870D A BE464870D A BE 464870DA BE 464870 A BE464870 A BE 464870A
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.)
Publication of BE464870A publication Critical patent/BE464870A/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
    • 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
BE464870D 1940-01-04 BE464870A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB210/40A GB537050A (en) 1940-01-04 1940-01-04 Improvements in or relating to line identification for telephone systems

Publications (1)

Publication Number Publication Date
BE464870A true BE464870A (en)

Family

ID=9700338

Family Applications (1)

Application Number Title Priority Date Filing Date
BE464870D BE464870A (en) 1940-01-04

Country Status (4)

Country Link
US (1) US2318267A (en)
BE (1) BE464870A (en)
FR (1) FR932148A (en)
GB (1) GB537050A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499776A (en) * 1946-05-27 1950-03-07 Teletype Corp Audible telephonic line identification
US3536839A (en) * 1968-10-11 1970-10-27 Bell Telephone Labor Inc Answer tone detection circuit

Also Published As

Publication number Publication date
FR932148A (en) 1948-03-12
US2318267A (en) 1943-05-04
GB537050A (en) 1941-06-06

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