| 摘要 |
PURPOSE:To correct dissidence of state between DCEs and between DTE and DCE by checking the level tri-state of all logical channels of all lines for a prescribed period and sending an RR packet to a channel in the P4 state (data transfer state). CONSTITUTION:A nearby station 5 being a packet exchange (DCE) is connected to a decentralized packet exchange 10 via a line 4a and a data terminal equipment(DTE) 6 is connected via a line 4b. A program 3a checks the management state of level 3 of all logical channels of all lines in its own processor (processor 2a) for each prescribed time and sends the RR packet to all logical channels whose management state is the P4. Then if the status dissidence in the P4 status stack on one of a processor side DCE and a DTE 6 takes place, a CQ (restoration request) packet and a CF (restoration acknowledge) packet are exchanged. Thus, both the DCE and the DTE transit to the P1 state (ready) and the status is coincident in the call setting enable state again.
|
