Switch proxy for providing emergency stand alone service in remote access systems
US7680252B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Nov 14, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2242/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A switch proxy comprising a controller, a translations database and a switching fabric are connected to a trunk group between a remote terminal and its controlling local switching system. The switch proxy monitors control signals to and from the switching system on the trunk. In the event of loss of control signals from the host switching system, the switch proxy intercepts requests for service, etc. from a calling telephone connected to the remote terminal and performs a look up in the translation database. If the call can be completed without the controlling switching system the call is looped back to the remote terminal. The translation database is maintained by a switch proxy management system that receives change orders from the local exchange carrier. The switch proxy management system forwards relevant changes to the switch proxy's translation database in the field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.