| 摘要 |
<p>In the electronic trunk-line connected telephone intercommunication system, local switches, trunk switches and logic circuits are provided. A multiplexer enables each local subscriber line to be connected with each of the trunk lines for a defined time interval, and for a multiplying factor to be introduced appropriate to the trunk-line concerned. The availability data for each trunk line may also be repeated to the local subscriber terminal. A summing facility is included to integrate the connection time of the subscriber to all trunk lines used.</p> |
