Call establishment
US9155120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2013 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Feb 13, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/00
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modem for use at a terminal, the modem comprising: a first interface arranged to connect to a communications network; a second interface arranged to connect to a host processor on the terminal; and a processing unit, the processing unit configured to: detect that a call is to be established over the communications network; in response to said detection, perform a call setup procedure; determine if the call setup procedure has been successful or has failed due to failure of a security procedure; and in response to determining that the call setup procedure has failed due to failure of a security procedure, repeat said call setup procedure without indicating failure of the call setup procedure to a user of said terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.