| 摘要 |
<p>Multi-party call system service, industrial and subscriber"s telephone equipment and network, where the traffic between the individual substations is realized without the central telephone exchange, furthermore, the through exchange traffic of individual substations of the multi-party networks is realized as well. The controlled switch if the system is inserted between the multi-party line and the telephone sets of the individual stations the control point of the switch is interconnected with the proper code memory. The substations are connected to the multi-party line in one state of the controlled switch, and it is switched off the line in the other. The service version of the telephone network, provided by the invention for alternatively selective or open operation, has doubled proper code memory in all individual substations. </p> |
