Techniques for vetting inbound calls in a telecommunication network
US11323563B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 21, 2021 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Sep 21, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/6027
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are described for vetting unwanted calls. At an inbound customer call handling apparatus, a SIP INVITE is received from a destination carrier servicing the inbound customer intended for a destination user agent (UA) device of the inbound customer. The SIP INVITE includes a current origination identifier (ORIG ID) comprised of a fixed length character string. The call handling apparatus accesses a database of stored ORIG ID character strings, each stored ORIG ID character string in the database having been included with a previous SIP INVITE that has been previously associated with an unwanted inbound call. The call handling apparatus analyzes the current ORIG ID character string to determine if it matches any stored ORIG ID character strings in the database. When there is a match to a stored ORIG ID character string, the SIP INVITE is not forwarded to the destination UA device. Otherwise, it is forwarded to the destination UA device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.