Voice traffic through a firewall
US7167486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Jan 15, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M7/009
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The number of holes that are opened in a firewall for internet telephony is limited to a first hole used for call control and a second hole used for audio traffic. Fixed destination ports for telephony traffic and call control traffics are created at a destination. Media streams are received at the telephony fixed destination port. The source of each media stream is commanded to provide a unique identifier for each media stream arriving at the destination from each source. Each media stream is identified by a unique identifier provided by the source. The unique identifier for each media stream is communicated to the destination by each source over call control. All telephony traffic is received only at the fixed destination port or telephony and all call control is received only at the fixed destination port for call control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.