Communications system and related method for routing calls to a different destination
US9369497B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2010 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jun 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/1104
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communications session call is established between first and second call devices. A SIP Reinvite command is sent to the second call device without any SDP media parameters to gain new and current media parameters. The second call device acknowledges the Reinvite command as corresponding to the first SDP offer with new and current media parameters. A third call device is sent a SIP Reinvite command as a second SDP offer using new and current media parameters. The third call device acknowledges the SIP Reinvite command as corresponding to the first SDP answer to the first SDP offer. The second call device acknowledges as a second SDP answer to the second SDP offer. The call with the first call device is terminated to change the destination of the call and maintaining any media stream between the second and third call devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.