CH442437A - Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen, mit Zweieranschlüssen
- Google Patents
Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen, mit Zweieranschlüssen
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Publication number
CH442437A
CH442437ACH336566ACH336566ACH442437ACH 442437 ACH442437 ACH 442437ACH 336566 ACH336566 ACH 336566ACH 336566 ACH336566 ACH 336566ACH 442437 ACH442437 ACH 442437A
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Application filed by Siemens AgfiledCriticalSiemens Ag
Publication of CH442437ApublicationCriticalpatent/CH442437A/de
H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
H04M15/36—Charging, billing or metering arrangements for party-lines
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
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
H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Computer Networks & Wireless Communication
(AREA)
Interface Circuits In Exchanges
(AREA)
Sub-Exchange Stations And Push- Button Telephones
(AREA)
CH336566A1965-03-111966-03-09Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen, mit Zweieranschlüssen
CH442437A
(de)