| 摘要 |
<p>The remote management of a group of items of equipment placed at a given location and served by a single telephone line is initiated by dialling the single telephone line from a telephone subscriber number a digit or digits of which provide an identification address of one selected item of equipment within the group. Each item of equipment within the group has a unique identification address and is adapted to answer a telephone call on the single telephone line only when presented with a calling line identity of which a digit or digits provide the unique identification address for that item of equipment. Thus, a management system can selectively interrogate individual items of equipment connected to a single telephone line, simply by providing for the presentation on the single telephone line of a calling line identity which has relevant digits coinciding with the unique address of the item of equipment being interrogated.</p> |
