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.)
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 filedfiledCritical
Priority to JP15914475ApriorityCriticalpatent/JPS5284387A/ja
Publication of JPS5284387ApublicationCriticalpatent/JPS5284387A/ja
Publication of JPS566750B2publicationCriticalpatent/JPS566750B2/ja
H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
H04Q9/08—Calling by using continuous ac
H04Q9/10—Calling by using continuous ac using single different frequencies
Landscapes
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Train Traffic Observation, Control, And Security
(AREA)
Monitoring And Testing Of Transmission In General
(AREA)
Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo
(AREA)
Selective Calling Equipment
(AREA)
JP15914475A1975-12-301975-12-30Relay process and relay in the frequency time sharing band erasing cen tralized supervisory system
GrantedJPS5284387A
(en)
