Patent ID: 6724891
Filing Date: 2004-04-20
Classification: H04L

Abstract:
A combined modem and line-isolation system, comprising:a line-side line-isolation integrated circuit; a system-side line-isolation integrated circuit; digital signal processing (DSP) circuitry included within the system-side line-isolation integrated circuit, the DSP circuitry having a modem processor for modem data and a digital processor for system-side circuitry; and caller ID circuitry integrated within the line-side line isolation integrated circuit, the caller ID circuitry being powered with a power supply derived from power transmitted across an isolation barrier between the line-side line isolation integrated circuit and a system-side line-isolation integrated circuit, and the caller ID circuitry comprising analog-to-digital converter circuitry configured to output digital data representative of caller ID information; wherein the line-side line-isolation integrated circuit and the system-side line-isolation integrated circuit are capable of being coupled to the isolation barrier to communicate digital information with each other through the isolation barrier, the digital information from the line-side line-isolation integrated circuit being configured to include the digital data representative of caller ID information.