| 摘要 |
PURPOSE:To cope optionally with the request of change of relay registration at each subsystem on a transmission line by providing a content code registrating table storage memory as to all terminal devices at two transmission lines each and revising the contents of the memory in response to the request from each terminal device. CONSTITUTION:When a command for registering a relay content code FC is received, a processing operating device 43 reads a transmitted address SA in the data, a change start FC and a changed FC number and selects the arrangement of an area corresponding in an FC table 480 by host. Then, the data requiring or not requiring registration in the received data is converted into a registration format of the FC table. This converted data is compared with the registered data of the area in the FC table obtained before, and after the presence of change is confirmed, then the FC registration data of the area is rewritten. If there exists no change, the processing is finished. Further, when a change is produced, the registered data of the corresponding area sequentially to the range of the corresponding FC and to all the SA other than the SA of the received data is extracted and whether the change of the total DC table 481 is required or not is checked. |
