Method and apparatus for providing on-hook transmission for digi

Details Method and apparatus for providing on-hook transmission for digi Method and apparatus for providing on-hook transmission for digi

1992-11-18

1993-11-16

Dwyer, James L.

Telephonic communications

Telephone line or system combined with diverse electrical...

379 93, 379 97, 379236, 379377, H04M 100

Patent

active

052630811

ABSTRACT:
On-hook VF transmission through a channel unit to a subscriber telephone instrument is provided by a control unit which generates control signals for the channel unit. The control unit responds to receipt of an "idle" code by creating commands which establish a VF path through the channel unit regardless of whether the subscriber instrument is on-hook or off-hook.

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Bellcore, "SPCS Customer Premises Equipment Data Interface", Technical Reference TR-TSY-000030 Issue 1, Nov. 1988, pp. ii-vi and pp. 1-13.

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