System and method for programmable telephone subscriber line test in ring mode
US6144722A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1997 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Jun 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for providing software-implemented, programmable testing of telephone subscriber line power conditions during ring mode. A user-controlled fault detection system for detecting subscriber line faults, including resistive faults and foreign voltages, on a telephone subscriber line during ring mode is provided. A user interface is provided to enter user-programmable threshold values corresponding to subscriber ring mode line fault conditions. A fault threshold memory, coupled to the user interface, is provided to store the generated threshold values. A current level detector identifies a ring mode current during ringing on the telephone subscriber line. A processing unit is configured and arranged to compare the ring mode current on the telephone subscriber line to the generated threshold values stored in the fault threshold memory. A fault is identified in response to the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.