Intelligent signal transfer point (ISTP)
US5586177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Sep 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13547
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An intelligent network, such as might provide telephone services or the like, comprises local communication links, one or more trunk circuits and a number of separately located central office switching systems. The network selectively provides switched call connections between at least two of the local communication links. The switching systems also exchange signaling messages via an interoffice signaling network, as part of the procedures for establishing call connections. The interoffice signaling network includes an Intelligent Signaling Transfer Point (ISTP) which communicates with the switching offices via signaling links that are separate from the local communication links and the trunk circuit(s). In accord with the present invention, the ISTP includes a database storing call processing data associated with a plurality of the local communication links for control of call processing through one or more of the central office switching systems. The ISTP also includes a program controlled processor. The processor recognizes a predetermined condition or trigger regarding the call and retrieves call processing information from the database. The ISTP may route the message to a dist…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.