System and method for call transfer within an internet protocol communications network
US8345669B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 2010 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Apr 1, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2207/203
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In accordance with a non-limiting example, the system and method places a call from a first call device used by a party A to a second call device such as used by a party B by routing the call from the first call device into a communications server that establishes an internet protocol (IP) call between the communications server and the second call device. A third call device such as used by a party C monitors the second call device. A first SIP invite command is sent from the third call device to the communications server as a pick-up call instruction for the call to the second call device when it has not answered the call from the first call device. A second SIP invite command is sent between the third call device and communications server and the call is transferred from the second call device to the third call device to establish a communications session between first and third call entities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.