NL71657C - - Google Patents

Info

Publication number
NL71657C
NL71657C NL71657DA NL71657C NL 71657 C NL71657 C NL 71657C NL 71657D A NL71657D A NL 71657DA NL 71657 C NL71657 C NL 71657C
Authority
NL
Netherlands
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 NL71657C publication Critical patent/NL71657C/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
NL71657D 1940-06-11 NL71657C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB289545X 1940-06-11

Publications (1)

Publication Number Publication Date
NL71657C true NL71657C (en)

Family

ID=10283886

Family Applications (1)

Application Number Title Priority Date Filing Date
NL71657D NL71657C (en) 1940-06-11

Country Status (4)

Country Link
US (1) US2423084A (en)
CH (1) CH289545A (en)
GB (1) GB609474A (en)
NL (1) NL71657C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762060A1 (en) * 1967-03-31 1970-04-30 Nippon Electric Co Inter-trunk dialing system for a telephone switched network

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963747A (en) * 1934-06-19 Telephone system
FR39002E (en) * 1927-08-09 1931-08-25
US2269462A (en) * 1940-06-21 1942-01-13 Bell Telephone Labor Inc Telephone system
US2276037A (en) * 1940-09-07 1942-03-10 Bell Telephone Labor Inc Telephone system

Also Published As

Publication number Publication date
US2423084A (en) 1947-07-01
GB609474A (en) 1948-10-01
CH289545A (en) 1953-03-15

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