Efficient address caching for packet telephony services
US9866701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2016 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Jun 13, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/36
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for telephony includes receiving at an Internet telephony service provider a subscriber request to place a call to a telephone number. A cache associated with the internet telephony service provider is queried to check if the cache holds a record for the telephone number. If the cache holds the record, the record is obtained. If the cache does not hold the record, a request is sent to a database server that maintains a database of records associating endpoint user terminal telephone numbers of subscribers with respective packet network addresses of the endpoint user terminal. The call is placed to the endpoint user terminal telephone number via a public switched telephone network while the request is sent to the database server to retrieve the packet network address of the endpoint user terminal to which calls to the telephone number should be placed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.