Patent ID: 6862352

Claim:
A method of selectively enabling each of a plurality of respectively different circuits of a multi-function circuit arrangement to perform its respective signaling function, each respectively different circuit requiring use of the same external passive analog circuit component to implement its respective signaling function, said method comprising the steps of: (a) providing a single external passive analog circuit component that corresponds to said same external passive analog circuit component, and (b) in association with performance of each respectively different circuit function of said multi-function circuit arrangement, (b1) enabling that one of said plurality of respectively different circuits which performs said each circuit function, while selectively disabling one or more others of said plurality of respectively different circuits which do not perform said each circuit function, and (b2) coupling said single external passive analog circuit component to said one of said plurality of respectively different circuits, while decoupling said single external passive analog circuit component from said one or more others of said plurality of respectively different circuits wherein said multi-function circuit arrangement comprises a telecommunication circuit card and said plurality of respectively different circuits include two or more of a polarity reversal detection circuit, a ring-trip circuit, and a line voltage measurement circuit, and wherein said same external passive analog circuit component comprises a capacitor.