Radio communication apparatus with means for requesting and displaying status of wired line
US5218628A · kind A · utility
28Cited by
3References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 1990 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Sep 27, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/733
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio communication apparatus used generally indoors and including a base unit connected to at least one wired line and a plurality of mobile units connected to the base unit through respective radio communication channels. Each mobile unit is able to know the status of use--busy, hold or idle--of the wired lines. Each mobile unit makes to the base unit a request for information on the status of use of the wired line. The base unit sends to the mobile unit the information on the status of use of the wired line in response to the request, which status is displayed in the respective mobile units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.