Telephonic communications – Multi-line or key substation system with selective switching... – With special service
Patent
1997-06-27
2000-01-11
Wolinsky, Scott
Telephonic communications
Multi-line or key substation system with selective switching...
With special service
379 9317, 379 9335, 379164, 379215, 379142, H04M 100
Patent
active
060144343
ABSTRACT:
A method for controlling and processing a call from one keyphone to a busy keyphone utilizing a keyphone main unit connected to an office line and a plurality of keyphones in a keyphone system, the busy keyphone being connected to a third keyphone, wherein the keyphone main unit receives an input sequence of dialed numbers from the one keyphone; determines when the input sequence is complete; transmits a first display signal to the busy keyphone to cause the busy keyphone to display a message indicating an incoming call from the one keyphone; determines whether the busy keyphone is in a forced off-hook ring mode; transmits a busy tone to the one keyphone when it is determined that the busy keyphone is not in the forced off-hook ring mode; checks for an input signal from an off-hook ring button on the one keyphone; transmits an off-hook ring signal to the busy keyphone when it is determined that the busy keyphone is in the forced off-hook ring mode or when it is determined that the off-hook ring button on the one keyphone was pushed, the off-hook ring signal causing the busy keyphone to perform an off-hook ring; transmitting a ring back tone and a camp-on-busy signal to the one keyphone; checks for an input signal indicative of an on/off activation of a switch hook or a CALL button on the busy keyphone; and stops the off-hook ring of the busy keyphone and connecting a speech path between the one keyphone and the busy keyphone when on/off activation of the switch hook or pushing of the CALL button on the busy keyphone is detected.
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Wolinsky Scott
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