| 摘要 |
Updating quote board (QB) messages are transmitted on reply lines connecting respective data retrievers and data terminus units of a request/reply data retrieval system serving respective pluralities of request units. A reply to any line initiates a QB message in the next bit interval and the message has a single bit sync section. During a QB message, a reply (if ready) is inhibited. QB data is stored until a plurality of QB units transmitting independently on respective reply lines are simultaneously ready to receive it. Each data terminus sends a sync section to a quote board during a respective reply and distinctively terminates it in the next bit interval. The QB message data is sent thereafter as it is received. Reception of a reply enables transmission of the next request and vice versa. Reception of a QB message delays enabling reception of a reply.
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