CH257256A - Telephone exchange. - Google Patents

Telephone exchange.

Info

Publication number
CH257256A
CH257256A CH257256DA CH257256A CH 257256 A CH257256 A CH 257256A CH 257256D A CH257256D A CH 257256DA CH 257256 A CH257256 A CH 257256A
Authority
CH
Switzerland
Prior art keywords
telephone exchange
telephone
exchange
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Standard Telephon Und Radio
Original Assignee
Standard Telephon & Radio Ag
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 Standard Telephon & Radio Ag filed Critical Standard Telephon & Radio Ag
Publication of CH257256A publication Critical patent/CH257256A/en

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
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of dc pulses
    • 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)
CH257256D 1945-05-14 1946-05-14 Telephone exchange. CH257256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US257256XA 1945-05-14 1945-05-14

Publications (1)

Publication Number Publication Date
CH257256A true CH257256A (en) 1948-09-30

Family

ID=21827722

Family Applications (1)

Application Number Title Priority Date Filing Date
CH257256D CH257256A (en) 1945-05-14 1946-05-14 Telephone exchange.

Country Status (2)

Country Link
CH (1) CH257256A (en)
FR (1) FR926800A (en)

Also Published As

Publication number Publication date
FR926800A (en) 1947-10-10

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