System and method for supporting DTMF tone sending in an IP based GSM network
US6487209B1 · kind B1 · utility
8Cited by
7References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Mar 16, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/181
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a system and method for reliably transferring Dual Tone Multiple Frequency (DTMF) signals originating at a MS through an IP based GSM network. In general, when a MS sends a DTMF request, it is processed in the IP network by a logical application module in a MSC, which, based on the disclosed processing, activates another logical application module in an appropriate gateway (for independent, remote, tone generation), and then the logical application module in the gateway directs the production of the DTMF signal towards the interworking or destination network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.