| 摘要 |
A connection adapter is disposed intervening between a communication module for connection to a radio packet communication network and high-level equipment. The connection adapter transmits a communication request for second high level equipment to a management computer after connecting to the radio packet communication network. The management computer sends a calling message to second connection adapter. Upon receipt of the calling message, the second connection adapter connects to the radio packet communication network. Then, each of the connection adapter relay the communication between the high-level equipments.
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