NL177372C - SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION. - Google Patents

SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION.

Info

Publication number
NL177372C
NL177372C NL7809547A NL7809547A NL177372C NL 177372 C NL177372 C NL 177372C NL 7809547 A NL7809547 A NL 7809547A NL 7809547 A NL7809547 A NL 7809547A NL 177372 C NL177372 C NL 177372C
Authority
NL
Netherlands
Prior art keywords
thread section
subscription line
special subscription
special
line
Prior art date
Application number
NL7809547A
Other languages
Dutch (nl)
Other versions
NL7809547A (en
Inventor
Wilhelmus Antonius Van Leeuwen
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Priority to NL7809547A priority Critical patent/NL177372C/en
Priority to BE2/58084A priority patent/BE878863A/en
Publication of NL7809547A publication Critical patent/NL7809547A/en
Application granted granted Critical
Publication of NL177372C publication Critical patent/NL177372C/en

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
NL7809547A 1978-09-19 1978-09-19 SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION. NL177372C (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL7809547A NL177372C (en) 1978-09-19 1978-09-19 SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION.
BE2/58084A BE878863A (en) 1978-09-19 1979-09-19 VIERDRAADSVERSTERKTE LIJN TUSSEN EEN OP EEN EINDCENTRALE AANGESLOTEN HUISTELEFOONCENTRALE EN EEN ABONNEETOESTEL

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7809547 1978-09-19
NL7809547A NL177372C (en) 1978-09-19 1978-09-19 SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION.

Publications (2)

Publication Number Publication Date
NL7809547A NL7809547A (en) 1980-03-21
NL177372C true NL177372C (en) 1985-09-02

Family

ID=19831575

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7809547A NL177372C (en) 1978-09-19 1978-09-19 SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION.

Country Status (2)

Country Link
BE (1) BE878863A (en)
NL (1) NL177372C (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA939091A (en) * 1971-09-01 1973-12-25 Bell Canada-Northern Electric Research Limited Long-line telephone circuit
US3970786A (en) * 1974-06-27 1976-07-20 Stromberg-Carlson Corporation Loudspeaking telephone with improved receive sensitivity
DE2739778A1 (en) * 1976-09-07 1978-03-16 Int Standard Electric Corp Amplitude control in digitally controlled private telephone exchange - employs peak level threshold detector signalling when level exceeded

Also Published As

Publication number Publication date
NL7809547A (en) 1980-03-21
BE878863A (en) 1980-03-19

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Legal Events

Date Code Title Description
A1B A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
V1 Lapsed because of non-payment of the annual fee
SNR Assignments of patents or rights arising from examined patent applications

Owner name: KONINKLIJKE PTT NEDERLAND N.V.