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Publication of DE282465CpublicationCriticalpatent/DE282465C/de
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
H04M3/51—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing
H04M3/523—Centralised call answering arrangements requiring operator intervention, e.g. call or contact centers for telemarketing with call distribution or queueing
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Signal Processing
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Details Of Connecting Devices For Male And Female Coupling
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Gespraechszaehlerschaltung, bei welcher das Amt und die Teilnehmerstelle mit von einer gemeinsamen Stromquelle gespeisten Gespraechszaehlern versehen sind