Patent ID: 8429259

Claim:
A network management system, comprising: a plurality of terminal devices; a network to which the plurality terminal devices are connected; and at least one peripheral device connected to the network, the at least one peripheral device being used in common by the plurality of terminal devices via the network based on communication setting information; wherein at least one of the plurality of terminal devices comprises: a display unit; a communication setting information acquiring system that acquires new communication setting information to be set for the at least one peripheral device; a display controller that controls the display unit to display a mode selecting screen for prompting a user to select one of: a restoring mode where the new communication setting information set for the at least one peripheral device is restored to previous communication setting information in response to a predetermined restoring condition being satisfied; and a definite mode where the new communication setting information set for the at least one peripheral device is definitely rendered valid; and a communication setting information sending system that sends, to the at least one peripheral device via the network, the new communication setting information acquired by the communication setting information acquiring system, wherein: the at least one peripheral device comprises: a communication setting information receiving system that receives the new communication setting information from the at least one of the plurality of terminal devices via the network; a setting changing system that: when the restoring mode is selected via the mode selecting screen displayed on the display unit, changes the previous communication setting information currently set for the at least one peripheral device to the received new communication setting information without deleting the previous communication setting information; and when the definite mode is selected via the mode selecting screen displayed on the display unit, changes the previous communication setting information currently set for the at least one peripheral device to the received new communication setting information and deletes the previous communication setting information; and an automatic setting restoring system that: when the restoring mode is selected via the mode selecting screen displayed on the display unit, automatically restores the new communication setting information set for the at least one peripheral device to the previous communication setting information in response to the predetermined restoring condition being satisfied; and when the definite mode is selected via the mode selecting screen displayed on the display unit, does not restore the new communication setting information set for the at least one peripheral device to previous communication setting information even if the predetermined restoring condition is satisfied.