Efficient address caching for packet telephony services
US8254278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2006 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | May 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/36
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for telephony includes receiving at a facility of a telephone service provider a first subscriber request to place a first call to a specified telephone number. A provider request is sent to a remote server (26), which maintains a database (28) of records associating telephone numbers with respective packet network addresses, for a record (72) indicating a packet network address to which calls to the specified telephone number should be placed. Upon receiving the record from the remote server, the record is stored in a local cache (42) at the facility of the telephone service provider. After storing the record, upon receiving at the facility of the telephone service provider a second subscriber request to place a second call to the specified telephone number, the record is read from the local cache and is used in placing the second call to the packet network address.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.