Arrangement for providing private-network line features on central-office-to-PBX trunks
US5825868A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Jun 4, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13384
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone central office switch (103) provides Centrex features, including intercom dialing, on central-office-to-PBX (133, 134) trunks (123, 124) by using the 4-wire subscriber feature of the Lucent Technologies 5ESS.RTM. switch to administer trunk ports (113-114) that serve the central-office-to-PBX trunks as 4-wire telephone lines and then further administering those trunk ports for Centrex features. Those trunk ports, and optionally also some line ports (115-116), may be administratively assigned the private network numbering plan of respective PBXs so as to enable intercom dialing among those trunk ports, and between those trunk ports and the optional line ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.