Apparatus system and method for enabling multi-frequency communication over a telephone network having a billing/tax tone
US6674843B1 · kind B1 · utility
42Cited by
3References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1999 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus, system, and method for enabling multi-frequency communication over a telephone network having a billing/tax tone are disclosed. The apparatus comprises a connection port operable to couple to a telephone network. An output port is coupled to the input port, and is operable to couple to a high frequency device. A trap is coupled between the connection port and the output port. The trap is tuned to isolate the high frequency device from the telephone network at a specified frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.