Analog multibutton telephone keysets
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United States of America Patent
Stats
-
Dec 16, 1997
Grant Date -
N/A
app pub date -
Dec 20, 1994
filing date -
Mar 5, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A keyset that connects to telephone switches via analog lines, wherein a processor in the keyset communicates with the switch via in-band signaling to provide keyset functionary. When a call comes into the switch for one of the directory numbers (DNs) associated with the keyset, the switch sends a frequency shift key (FSK) encoded message to all of the keysets associated with that DN. The FSK message includes at least the DN of the terminating telephone line, and may also include an extension number or other code. The processor in the keysets receives the message, decodes it, and then alerts the users of the incoming call.
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Family
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