Abstract: A communication device having a communication module as data circuit-terminating equipment connecting to a wireless packet communication network, and a controller interposed between the communication module and a data terminal equipment. The controller controls communication performed by the data terminal equipment using the communication module. The controller extracts, from a communication message sent from the data terminal equipment to a first management server, identification information of the data terminal equipment, stores the extracted identification information in a storage, and transmits the extracted identification information to a second management server by using the communication module when communication is not performed between the data terminal equipment and the first management server.

Abstract: A wireless communication modem (2) receives data (10) sent from a host device (4) in a nonprocedural manner, then subjects the received data (10) to protocol conversion, and transmits the converted data to a server (8) via a wireless communication network (6). The wireless communication modem (2) has an on-request transmission mode in which the data (10) is transmitted to the server (8) only when a connection from the server (8) to the wireless communication modem (2) is established.

Abstract: A wireless communication modem (2) receives data (10) sent from a host device (4) in a nonprocedural manner, then subjects the received data (10) to protocol conversion, and transmits the converted data to a server (8) via a wireless communication network (6). The wireless communication modem (2) has an on-request transmission mode in which the data (10) is transmitted to the server (8) only when a connection from the server (8) to the wireless communication modem (2) is established.

Abstract: 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.

Abstract: A communication apparatus comprising a communication module that serves as Data Circuit-terminating Equipment used in a radio packet communication network; an auxiliary circuit board on which said communication module is mounted; a main circuit board on which a communication controller is mounted; and a signal line for connecting said main circuit board to the auxiliary circuit board detachably; wherein said main circuit board further comprises a detecting means for detecting a type of the connected communication module based on a pattern of a signal status on the signal line at a start-up, and said communication controller performs a communication control operation in accordance with a result of detection by the detecting means.

Abstract: 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 comprises a connection controller for controlling connection between the high-level equipment and the radio packet communication network, and a communication controller for relaying the communication by the high-level equipment using the communication module. When the communication controller of the connection adapter detects duplication of a TCP packet received from the high-level equipment, the communication controller discards the duplicated packet.

Abstract: A communication device having a communication module as data circuit-terminating equipment connecting to a wireless packet communication network, and a controller interposed between the communication module and a data terminal equipment. The controller controls communication performed by the data terminal equipment using the communication module. The controller extracts, from a communication message sent from the data terminal equipment to a first management server, identification information of the data terminal equipment, stores the extracted identification information in a storage, and transmits the extracted identification information to a second management server by using the communication module when communication is not performed between the data terminal equipment and the first management server.

Abstract: A transportation management system includes: a communication device having a communication module and a communication antenna provided at a storage box for transmitting predetermined data to the outside world via a communication network, and a controller provided at the storage box for transmitting, during transportation by the communication module and the communication antenna, temperature data including temperatures detected by a temperature sensor during transportation; and a server having a receiver for receiving the predetermined data including the temperature data transmitted by the communication device via the communication network, the server obtaining the temperature data received by the receiver.

Abstract: A machining apparatus for making the scroll parts comprising a headstock including a spindle for supporting a workpiece for rotation, a tool holder for supporting a machining tool, a first carriage supported for movement in a direction perpendicular to the spindle (an X-axis), a second carriage supported for movement in a direction parallel to the spindle, and a control device for controlling the movement of the first carriage and the rotation of the spindle according. The control device is so programmed as to calculate the distance between the center of the base circle generating a desired involute curve depicted by the scroll parts and the center of the machining tool and also to calculate the angle of rotation C of the spindle relative to the distance.