| 摘要 |
PCT No. PCT/SE83/00167 Sec. 371 Date Dec. 21, 1983 Sec. 102(e) Date Dec. 21, 1983 PCT Filed Apr. 27, 1983 PCT Pub. No. WO83/04115 PCT Pub. Date Nov. 24, 1983.An apparatus is provided in a digital communication system for connecting digital terminals to a terminal junction point which in turn is in communication with a digital exchange. The terminal junction point contains directing means (9) for sending, in a first state, a flag signal both to all terminals (3) and to the exchange (1) and sending, in a second state, an information packet received from a terminal both to the exchange and to all terminals. The terminals have means (27,28) for sending an information packet in response to the flag signal having been received a given number of times, the reception of the packet at the junction point resetting the directing means to its second state. The terminal also contains comparison means for determining whether the packet information sent back from the junction point corresponds to the terminal's own sent-out packet information, and for disconnecting the terminal in the opposite case. |
