Method and apparatus for providing optional service functions in a private branch exchange
US6005941A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | May 16, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13376
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A private branch exchange has optional service modules for providing optional service functions. The optional service modules are initially disabled, but can be enabled through a telecommunication link, in reply to owner information furnished by the private branch exchange. If the owner information is incorrect, the optional service modules can still be enabled, but the owner information stored in the private branch exchange is altered to leave evidence of the enabling operation. The enabling is carried out by remote authorization equipment according to an authorization key that specifies both the required optional service modules and the owner information. The authorization key is stored on a data medium that can be read only once.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.