| 摘要 |
A connection control device for controlling data communication involving set-up of a connection provided on both sides of a communication source and a communication destination to control connection states of both sides in cooperation with a communication partner, each device controlling communication between a data terminating equipment and a data circuit-terminating equipment on its side, including connection holding means for holding the state of an established connection after a disconnection of a physical line, communication resuming means for resuming communication by a held connection after a re-connection of a physical line, control means for processing a transition of said connection states, a control message communication means for transmitting and receiving information of a communication partner and information of a transition of the connection states to and from the communication partner as a control message, and information storage means for storing information of a communication partner and information of a connection with said communication partner.
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