The Am79C02/03/031(A) Dual Subscriber Line Audio Processing Circuit (DSLAC device) integrates the key functions of an analog linecard into a single high-performance, programmable dual codec/filter device. The DSLAC device is based on the proven design of the reliable Am7901A Subscriber Line Audio Processing Circuit (SLACTM device). The advanced architecture of the DSLAC device implements two independent channels and employs digital filters to allow software control of transmission, thus providing a cost effective solution for the analog to PCM function of a linecard.