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Publication of BE675271ApublicationCriticalpatent/BE675271A/xx
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
H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems