Telephone communication system
US7443837B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2004 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Apr 9, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/0045
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone communication system in which a call-originating side and a call-incoming side communicate by telephone via a communication network capable of wideband communication and narrowband communication. When an apparatus exclusively used for narrowband communication, an apparatus capable of wideband communication and narrowband communication, and an apparatus exclusively used for wideband communication exist mixedly in between one end and another end, at least one of phone-call path parts between adjacent ones of the apparatuses is set to be different in transmission capability on a per phone-call path part basis, by sending and receiving information about transmission capabilities of the apparatuses in between the one end and the another end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.