Abstract: In a connection setting information managing system which is configured to set connection setting information using a setting tool, wherein the connection setting information allows a network device connected to an IP network to perform a communication over the IP network, the system includes: a connection setting information storage unit configured to store the connection setting information therein, wherein the connection setting information comprises a tag name that is assigned to and is unique to the network device. The setting tool sets the connection setting information to the network device, based on the tag name that is unique to the network device.

Abstract: It is to realize a network management system which can suppress to a minimum a time during which it is impossible to make a communication when a trouble occurs in any of field wireless management stations formed to be redundant. In a network management system in which field wireless management stations 11, 12 having gateway functions and system management functions incorporated are redundantly connected together, the field wireless management stations 11, 12 include at least switch modules 11b, 12b, and the plurality of field wireless management stations 11, 12 are connected to each other through a synchronizing cable 30 and synchronizing connectors CNa, CNb provided in the synchronizing cable 30, and switches SWm are connected in series to a synchronizing system which connects the switch modules 11b, 12b to each other to turn on and off the system.

Abstract: It is to realize a network management system excellent in its reliability which can prevent a wrong connection when a field wireless management station having a redundant structure is installed, and can make a backbone network redundant so as to improve a trouble resistance. In a network management system in which filed wireless management stations having gateway functions and system management functions incorporated are redundantly connected together, the plurality of field wireless management stations 11, 12 are connected to each other through a synchronizing cable 30 and synchronizing connectors Can, CNb provided in the synchronizing cable 30.

Abstract: A communication system may include a first network connected to lower-layer equipment, a second network connected to a higher-layer application, a gateway device connected to the first network and the second network, and a tunnel device connected to the first network and the second network, the tunnel device bypassing the gateway device.

Abstract: It is to realize a network management system excellent in its reliability which can prevent a wrong connection when a field wireless management station having a redundant structure is installed, and can make a backbone network redundant so as to improve a trouble resistance. In a network management system in which filed wireless management stations having gateway functions and system management functions incorporated are redundantly connected together, the plurality of field wireless management stations 11, 12 are connected to each other through a synchronizing cable 30 and synchronizing connectors Can, CNb provided in the synchronizing cable 30.

Abstract: It is to realize a network management system which can suppress to a minimum a time during which it is impossible to make a communication when a trouble occurs in any of field wireless management stations formed to be redundant. In a network management system in which field wireless management stations 11, 12 having gateway functions and system management functions incorporated are redundantly connected together, the field wireless management stations 11, 12 include at least switch modules 11b, 12b, and the plurality of field wireless management stations 11, 12 are connected to each other through a synchronizing cable 30 and synchronizing connectors CNa, CNb provided in the synchronizing cable 30, and switches SWm are connected in series to a synchronizing system which connects the switch modules 11b, 12b to each other to turn on and off the system.

Abstract: In a connection setting information managing system which is configured to set connection setting information using a setting tool, wherein the connection setting information allows a network device connected to an IP network to perform a communication over the IP network, the system includes: a connection setting information storage unit configured to store the connection setting information therein, wherein the connection setting information comprises a tag name that is assigned to and is unique to the network device. The setting tool sets the connection setting information to the network device, based on the tag name that is unique to the network device.

Abstract: A communication system may include a first network connected to lower-layer equipment, a second network connected to a higher-layer application, a gateway device connected to the first network and the second network, and a tunnel device connected to the first network and the second network, the tunnel device bypassing the gateway device.