System and method for generating a network call identifier
US5809121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1995 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Dec 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/1338
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system and method for the switches of a telecommunications network to create and transport a network call identifier (NCID) which uniquely identifies a telephone call as it traverses through a telecommunications network. Upon receipt of a telephone call in a switch, the switch first determines whether it has received an NCID with the telephone call. If the switch received an NCID, the switch determines whether it is a valid NCID and should be transported with the telephone call. If the received NCID should not be transported, the switch discards the received NCID and creates a new NCID for the telephone call. Alternatively, upon the receipt of a telephone call, if the switch determines that a NCID was not received, the switch determines if an NCID should be created. The switch creates an NCID if it determines that an NCID should be created for the telephone call. If the NCID is created or kept, the switch stores the NCID in an appropriate call record that contains information about the telephone call. After the switch creates an NCID, records a valid received NCID, or determines not to create an NCID, and completes the telephone call's call record, the switch transports the telep…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.