Private branch exchange system
US6765999B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 2002 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Sep 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/527
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A private branch exchange has a terminating classification table for storing, in connection with terminating information transmitted through an outside line circuit, destining extension numbers and additional parameters by relating them to each other and a control unit for controlling the above components. When a call terminates at the outside line circuit, the control unit picks up a destining extension number corresponding to terminating information from the terminating classification table, delivers a terminating signal from a corresponding extension line circuit and also delivers a corresponding additional parameter in the form of an additional parameter signal from the inside line circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.