AT670B - Schaltung für gemeinschaftliche Fernsprechleitungen zur Verhinderung des gleichzeitigen Anschlusses mehrerer Sprechstellen an die Leitung.
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Schaltung für gemeinschaftliche Fernsprechleitungen zur Verhinderung des gleichzeitigen Anschlusses mehrerer Sprechstellen an die Leitung.
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Publication number
AT670B
AT670BAT670DAAT670BAT 670 BAT670 BAT 670BAT 670D AAT670D AAT 670DAAT 670 BAT670 BAT 670B
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.)
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Publication date
Application filed by Julius Henrik WestfiledCriticalJulius Henrik West
Application grantedgrantedCritical
Publication of AT670BpublicationCriticalpatent/AT670B/de
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/68—Circuit arrangements for preventing eavesdropping
H04M1/70—Lock-out or secrecy arrangements in party-line systems
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
H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Computer Networks & Wireless Communication
(AREA)
Telephone Set Structure
(AREA)
Interconnected Communication Systems, Intercoms, And Interphones
(AREA)
AT670D1898-02-231899-04-22Schaltung für gemeinschaftliche Fernsprechleitungen zur Verhinderung des gleichzeitigen Anschlusses mehrerer Sprechstellen an die Leitung.
AT670B
(de)