Patent Number: 6,298,133

Title: Telephone line interface architecture using ringer inputs for caller ID data

Abstract: A capacitive interface may be utilized to provide a linear output from the TIP and RING phone lines to ringer circuitry. Because the interface provides a linear signal, the input provided to the ringer circuitry may also be utilized for other functions in addition to ringer detection functions. More particularly, the outputs of the capacitive interface may also be connected to caller ID circuitry input lines so as to also provide caller ID data. The use of common inputs for the ringer circuitry and the caller ID circuitry eliminates the need for a separate caller ID interface.

Inventors: Hein; Jerrell P. (Driftwood, TX), Scott; Jeffrey W. (Austin, TX), Sooch; Navdeep S. (Austin, TX), Welland; David R. (Austin, TX)

Assignee: Silicon Laboratories, Inc.

International Classification: H03M 1/42 (20060101); H04M 11/06 (20060101); H03M 1/38 (20060101); H04M 1/57 (20060101); H04L 25/06 (20060101); H04M 19/00 (20060101); H04M 19/02 (20060101); H04L 7/033 (20060101); H04M 001/738 (); H04M 019/00 ()

Expiration Date: 10/02/2018