Method and apparatus for off-hook management of plural...

Details Method and apparatus for off-hook management of plural... Method and apparatus for off-hook management of plural...

2005-02-08

2005-02-08

Nguyen, Duc (Department: 2643)

Telephonic communications

Substation or terminal circuitry

Hold circuit

C379S207060, C379S283000, C379S286000

Reexamination Certificate

active

06853725

ABSTRACT:
An off-hook management telecommunication system comprising a DTMF detector, an encoder and a microprocessor located within a channel unit. The system allows the user to depress a selected sequence of keys during a line connection which indicate to the microprocessor to hold the line off-hook, via signaling to a central office, despite the fact that the telephone is being returned to an on-hook position. The line is held off-hook for a predetermined amount of time to allow the user to switch telephones.

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