BORSCHT

thumb|Silicon Laboratories Si3210M-FM - Programmable CMOS SLIC/Codec with Ringing/Battery Voltage Generation (Performs all BORSCHT functions) BORSCHT is an acronym for the set of functions performed by a subscriber line interface circuit (SLIC) in the line card of a telecommunication system providing plain old telephone service. The letters represent the following functions: battery feed (B), overvoltage protection (O), ringing (R), signaling (S), coding (C), hybrid (H), and test (T).