Legal status (The legal status 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 status listed.)
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
H04Q5/08—Signalling by continuous AC
H04Q5/10—Signalling by continuous AC using single frequencies for different subscribers
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
H04L12/00—Data switching networks
H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
Schaltungsanordnung fuer mit Wechselstroemen, die ausserhalb des ueblichen Sprech-frequenzbereiches liegen, betriebene Ferndrucker, Frequenzschreiber oder Telautographen
Verfahren zum Betriebe von Nachrichtenapparaten ueber Starkstromleitungen mittels ueberlagerter Frequenzstroeme, welche nach dem Hauptpatente 446981 einem durch Frequenzvariation eines Generators erzeugten Frequenzbande entnommen und ueberlagert werden