AT121480B - Fernsprechsystem für Zugleitung. - Google Patents

Fernsprechsystem für Zugleitung.

Info

Publication number
AT121480B
AT121480B AT121480DA AT121480B AT 121480 B AT121480 B AT 121480B AT 121480D A AT121480D A AT 121480DA AT 121480 B AT121480 B AT 121480B
Authority
AT
Austria
Prior art keywords
telephone system
train line
train
line
telephone
Prior art date
Application number
Other languages
English (en)
Inventor
Richard Urban
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT121480B publication Critical patent/AT121480B/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/18—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre
    • H04Q5/22—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with indirect connection, i.e. through subordinate switching centre the subordinate centre not permitting interconnection of subscribers connected thereto

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Alarm Systems (AREA)
AT121480D 1928-02-08 1928-08-27 Fernsprechsystem für Zugleitung. AT121480B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE143530X 1928-02-08

Publications (1)

Publication Number Publication Date
AT121480B true AT121480B (de) 1931-02-25

Family

ID=5669759

Family Applications (3)

Application Number Title Priority Date Filing Date
AT120149D AT120149B (de) 1928-02-08 1928-08-27 Einrichtung an Fernsprechsystemen für Zugleitung.
AT128172D AT128172B (de) 1928-02-08 1928-08-27 Einrichtung an Zugleitungs-Fernsprechsystemen.
AT121480D AT121480B (de) 1928-02-08 1928-08-27 Fernsprechsystem für Zugleitung.

Family Applications Before (2)

Application Number Title Priority Date Filing Date
AT120149D AT120149B (de) 1928-02-08 1928-08-27 Einrichtung an Fernsprechsystemen für Zugleitung.
AT128172D AT128172B (de) 1928-02-08 1928-08-27 Einrichtung an Zugleitungs-Fernsprechsystemen.

Country Status (3)

Country Link
AT (3) AT120149B (de)
CH (1) CH143530A (de)
FR (1) FR669274A (de)

Also Published As

Publication number Publication date
AT128172B (de) 1932-05-10
AT120149B (de) 1930-12-10
FR669274A (fr) 1929-11-14
CH143530A (de) 1930-11-15

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