In-line telephony data protector with line condition announce
US6556661B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2000 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jan 2, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A data protector for telephony test equipment, comprising a relay for selectively connecting the telephony test equipment to a telecommunication line, and electronic circuitry. The electronic circuitry includes a detector portion adapted for detecting signals within a continuous band of frequencies present on the telecommunication line, and a microcontroller. The microcontroller has a frequency counter function for determining whether data is present on the telecommunication line, a relay connect control function for selectively controlling the relay to connect the telephony test equipment to the telecommunication line, and an alert operator function for producing a signal if the detected frequency is above a predetermined threshold. A method for preventing telephony test equipment from unintentionally disrupting signals on telecommunication lines, comprising the steps of: providing a relay between the telecommunication test equipment and the telecommunication line; providing electronic circuitry including a single band frequency counter; determining whether data signals are present on the telecommunication line using the single band frequency counter; in response to determining th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.