The L8560 full-feature, low-power subscriber line interface circuit (SLIC) is optimized for low power consumption while providing an extensive set of features. This part is ideal for ISDN terminal adapter applications and short-loop, power-sensitive applications such as pair gain and cable telephony. This part is also designed for PBX, DLC, or CO applications. The SLIC includes an auxiliary battery input and a battery switch. In short-loop applications, SLICs can be used in high battery to present a high on-hook voltage, and then switched to low battery to reduce off-hook power.