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Filing date
Publication date
Application filedfiledCritical
Priority to JP4116675ApriorityCriticalpatent/JPS51116606A/ja
Publication of JPS51116606ApublicationCriticalpatent/JPS51116606A/ja
Publication of JPS5751316B2publicationCriticalpatent/JPS5751316B2/ja
H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
H04Q3/60—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to satellites or concentrators which connect one or more exchange lines with a group of local lines
Landscapes
Physics & Mathematics
(AREA)
Astronomy & Astrophysics
(AREA)
General Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Monitoring And Testing Of Exchanges
(AREA)
Sub-Exchange Stations And Push- Button Telephones
(AREA)
JP4116675A1975-04-071975-04-07Subscriver's abandon-on-the-way supervision system
GrantedJPS51116606A
(en)