Chapter 391

Power supplies for subscriber line interface circuits

Eddie Beville

Abstract

Power supplies for subscriber line interface circuits (SLICs) are described.

Keywords

Subscriber line interface circuit

SLIC

LT1171

LT1269

As the demand for worldwide networking grows, so will the need for advanced data transmission products. In particular, ISDN services have become popular because of the recent development of the Internet. ISDN provides higher speed data transmission than standard modems used in PCs. Also, ISDN supports the standard telephone interface (voice and fax), which includes the subscriber line interface circuit (SLIC). A SLIC requires a negative power supply for the interface and the ringer voltages. The power supplies ...

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