Authenticating voice calls from mobile devices
US8548432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2012 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Aug 29, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L65/403
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Aspects relate to authorizing mobile devices for PBX-based voice services. A mobile device calls a PBX over a voice channel, and phone number identifier information is obtained and matched to identifier information for devices that known (authorizeable) to use the PBX. If there is one incoming call that matches to a given device, and an authentication token provided over a data channel matches an authentication token associated with that device, then the device is authorized for voice services. Where there are multiple matching calls, those devices are instructed to provide authentication tokens over their voice channels. The devices can detect absence of a data channel and provide authentication tokens over the voice channels; the devices also can wait to receive a call connected response and in the absence of such provide their authentication tokens over the voice channel. Tokens can be requested and downloaded for storage at the devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.