Key telephone exclusion circuit

Details Key telephone exclusion circuit Key telephone exclusion circuit

H - Electricity

04

M

379/33

H04M 3/42 (2006.01) H04M 9/00 (2006.01)

Patent

CA 1142663

TITLE KEY TELEPHONE EXCLUSION CIRCUIT ABSTRACT OF THE INVENTION An exclusion circuit for use in a key tele- phone providing an exclusion release feature. Key telephones are excluded or prevented from accessing a busy line by the exclusion circuit The exclusion release feature, in a key telephone connected to a telephone line, is operated in response to operation of an exclusion release key or partial operation of a hold key, to allow an associated excluded key tele- phone to connect to a busy telephone line.

355463

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