| 摘要 |
The invention concerns a telematic installation separate from at least an existing standard telephone network, but combined therewith, and comprising a plurality of telephone sets wherefrom users can form standard telephone codes corresponding to telephone sets of the existing network subscribers to establish remote communication with them. The invention is characterised in that it comprises geographical representations (10) such as plans and maps, printed or broadcast on computer screens (12) each having a grid with easting (14) and northing (15) co-ordinates whereof the combination forms at least a part of a specific telephone code and at least a station (20) intermediate between the existing telephone network, which station (20) is connected to said network by at least a standard telephone code and has at least an apparatus for code conversion between all the specific telephone codes and part at least of the standard telephone codes. |
