BE858450A - DIGITAL PRIVATE AUTOMATIC OFFICES - Google Patents

DIGITAL PRIVATE AUTOMATIC OFFICES

Info

Publication number
BE858450A
BE858450A BE2056222A BE2056222A BE858450A BE 858450 A BE858450 A BE 858450A BE 2056222 A BE2056222 A BE 2056222A BE 2056222 A BE2056222 A BE 2056222A BE 858450 A BE858450 A BE 858450A
Authority
BE
Belgium
Prior art keywords
private automatic
digital private
offices
automatic offices
digital
Prior art date
Application number
BE2056222A
Other languages
French (fr)
Inventor
G A Howells
G Williams
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BE858450A publication Critical patent/BE858450A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
BE2056222A 1976-09-07 1977-09-07 DIGITAL PRIVATE AUTOMATIC OFFICES BE858450A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3699076 1976-09-07

Publications (1)

Publication Number Publication Date
BE858450A true BE858450A (en) 1978-03-07

Family

ID=10392836

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2056222A BE858450A (en) 1976-09-07 1977-09-07 DIGITAL PRIVATE AUTOMATIC OFFICES

Country Status (2)

Country Link
BE (1) BE858450A (en)
DE (1) DE2739778A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL177372C (en) * 1978-09-19 1985-09-02 Nederlanden Staat SPECIAL SUBSCRIPTION LINE WITH A FOUR THREAD SECTION.
DE3135659A1 (en) * 1981-09-09 1983-03-31 Standard Elektrik Lorenz Ag, 7000 Stuttgart CIRCUIT ARRANGEMENT FOR TELEPHONE NETWORKS
EP0078355B1 (en) * 1981-10-28 1985-07-31 International Business Machines Corporation Line circuit containing impedance adaptation means
FR2580449B1 (en) * 1985-04-12 1987-05-22 Thomson Csf LARSEN SUPPRESSION CIRCUIT IN THE FALSE CALL AREA FOR A SUBSCRIBER TELEPHONE

Also Published As

Publication number Publication date
DE2739778A1 (en) 1978-03-16

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