AU2715249A - Control circuit fora busy relay ina telephone system - Google Patents

Control circuit fora busy relay ina telephone system

Info

Publication number
AU2715249A
AU2715249A AU27152/49A AU2715249A AU2715249A AU 2715249 A AU2715249 A AU 2715249A AU 27152/49 A AU27152/49 A AU 27152/49A AU 2715249 A AU2715249 A AU 2715249A AU 2715249 A AU2715249 A AU 2715249A
Authority
AU
Australia
Prior art keywords
control circuit
telephone system
busy relay
ina telephone
circuit fora
Prior art date
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.)
Expired
Application number
AU27152/49A
Other versions
AU146369B2 (en
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of AU146369B2 publication Critical patent/AU146369B2/en
Publication of AU2715249A publication Critical patent/AU2715249A/en
Expired legal-status Critical Current

Links

AU27152/49A 1949-04-22 Control circuit fora busy relay ina telephone system Expired AU146369B2 (en)

Publications (2)

Publication Number Publication Date
AU146369B2 AU146369B2 (en) 1949-05-26
AU2715249A true AU2715249A (en) 1949-05-26

Family

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