KEY TELEPHONE SYSTEM

PURPOSE:To attain the call operation of a called party repetitively at in- premises broadcast with a very simple operation. CONSTITUTION:A 2nd call is required when no reply comes from a called party regardless of a 1st call. In the case of making the 2nd call, a transfer party implements another sp...

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Bibliographic Details
Main Author TAMURA MAKOTO
Format Patent
LanguageEnglish
Published 13.11.1992
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
SELECTING
TELEPHONIC COMMUNICATION
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