| 摘要 |
PURPOSE:To acquire incoming calls uniformly by plural terminals connected to one bus line, by detecting the completion of one communication by incoming by a detection equipment, and converting the value of a terminal identifier by a conversion equipment. CONSTITUTION:An exchange 5 sets a first bit at '0' as a fixed value when allocating the identifiers of the terminals 8a-8n. When the incoming from the exchange 5 arrives, the terminal 8a acquires the incoming by a contention control procedure, and starts the communication, and the completion of the communication is informed to the conversion equipment 13 of the terminal identifier. The identifier conversion equipment 11a of the terminal rewrites the value of an identifier storage circuit 9a to the value of the terminal identifier at the time of completing the incoming for the first time. Simultaneously, the equipment 13 of the exchange 5 rewrites the value of the terminal identifier of the terminal 8a in an identifier storage circuit 4 to the value of the terminal identifier at the time of completing the incoming for the first time. Next, since '0' exists in the low-order bit of the identifier of the terminal 8b when the identifiers of the terminals 8a and 8b are compared, the response of the terminal 8b is delivered to the exchange by the incoming from the exchange 5 based on the contention control procedure, then, the terminal 8b acquires the incoming and starts the communication.
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