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
H04Q5/18—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
Schaltungsanordnung fuer Fernmelde-, insbesondere Fernsprechanlagen mit an gemeinsamer Leitung liegenden, wahlweise anrufbaren Abzweigstellen und Geheimverkehr
Schaltungsanordnung fuer Fernmeldeanlagen, in denen Sendestellen mit ihren Empfangsstellen ueber eine zweiadrige Verbindungsleitung im Simultan- und Schleifenbetrieb verbunden sind