Contextual Info: GEC PLESSEY SI ADVANCE INFORMATION S E M I C O N D U C T O R ! ! SL379 SUBSCRIBER LINE INTERFACE CIRCUIT Replaces SL 7953 Datasheet (DS2448-1.0 The S L379 is a Subscriber Line Interface C ircuit (SLIC) for use at th e telephone exchange or PABX end of a telephone