Telephone line interface architecture using ringer inputs for caller ID data
US6298133A · kind A · utility
16Cited by
75References
48Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1998 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Mar 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.