The ZL792588 Next Generation Octal External Ringing Subscriber Line Audio-processing Circuit (SLAC) device, in combination with the Le79271 SLIC device, implements a high density eight-channel universal telephone line interface with wideband capability for internal or external ringing applications. This enables the design of a low cost, high performance, fully software programmable line interface with worldwide applicability. All AC, DC, and signaling parameters are programmable via a microprocessor interface. Low Density Chip Set: Octal SLAC (codec) + Long Loop SLICs Le792388 (codec) + Le79271 (SLIC) / Le79272 (Dual SLIC) ZL792588 (codec with External/ Internal Ringing) + Le79271 (SLIC) / Le79272 (Dual SLIC)