| 摘要 |
A system incorporating a cluster of several telephone stations or terminals to interface with one or more frequently called remote data stations for economy of dial-up connection in accommodating communication with multiple terminals of the cluster during a single call to a remote station. With a call from one terminal to a remote data station, a transmit-receive unit interfaces the cluster with the data station setting the terminals in the cluster in a polling sequence to accommodate additional communications. The system preserves an "off-hook" state polling the individual terminals in the cluster to accommodate further communication from the cluster terminals to the central data station. Polling is facilitated by a cluster counter in the transmit-receive unit coordinated with logic indicating the state of each terminal in the cluster.
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