Call control
US8374330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2010 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Mar 11, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of call control in which a first communications network, detecting calls directed to a destination in the first network; redirects at least some of the calls to a destination in a second network (e.g. on no answer from the destination in the first network). The first network then operates in two phases. In a first phase, for a group of calls redirected to the second network, the time delay before the call is answered in the second network is recorded. When a number of time delays have been recorded, a delay period is set to a value less than the maximum value of the recorded time delays. In a second phase, for a second group of calls redirected to the second network subsequent to the calls of the first group, when a call of the second group is not answered in the second network within the delay period, the call is redirected to a message service associated with the first network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.