Subscriber Line Interface Card. Card that performs the interface between a subscriber's phone line and the switching network.

Subscriber Loop Interface Circuit. Electronic version of the two- to four-wire hybrid interface that supplies an analogue signal from a line card to a subscriber's phone or network terminal equipment. It provides what is known as the BORSCHT functions in telephony (Battery Feed, Overvoltage Protection, Ringing, Signalling, Coding, Hybrid, and Test).

Subscriber line interface circuit

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