ISDN basic rate interface central office station terminal emulator for customer premises equipment
US5535198A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1994 |
| Grant date | Jul 9, 1996 |
| Priority date | — |
| Expiry date | Jun 3, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13335
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Full channel service is obtained over a modified ISDN BRI interface by emulating at least one central office (CO) station terminal which provides access to a voice channel over a single DSL for user station terminals whether or not they are ISDN BRI compatible. To this end, an interface is provided for the DSL that emulates an ISDN BRI CO station terminal and acts like a facility to station terminals. More specifically, a plurality of CO station terminals are emulated on a single multi-point passive bus terminating the single DSL. Each of the emulated CO station terminals presents to the CO switching office the appearance of being a CO station terminal. The emulated CO station terminals are configured such that CO features are accessible. Information from the emulated CO station terminals is mapped into existing system structures where such structures are available and compatible with the information from the emulated terminal. New structures have been created so that CO supplementary services can be invoked by the emulated CO station terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.