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 JP4404275ApriorityCriticalpatent/JPS51118309A/ja
Publication of JPS51118309ApublicationCriticalpatent/JPS51118309A/ja
Publication of JPS5633027B2publicationCriticalpatent/JPS5633027B2/ja
H04M3/42—Systems providing special services or facilities to subscribers
H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
JP4404275A1975-04-101975-04-10Control circuit for number notification
GrantedJPS51118309A
(en)