Communication system including portable terminals and fixed terminals
US5157660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1990 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Sep 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/022
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system including a plurality of portable terminal apparatuses each capable of calling a partner terminal apparatus via a radio channel and a plurality of fixed terminal apparatuses each being connected via an ISDN interface to a time-division switch and each being connectable to the portable terminal in which when two portable terminals having an established cell are respectively attached to two fixed terminal apparatuses arbitrarily selected, the state of the call is automatically transferred to the two fixed terminal apparatuses so that the speech can be achieved between the fixed terminal apparatuses without conducting another call establishing procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.