Power management apparatus

A management apparatus, comprising:

• an interface section for receiving an input of at least an on command or an off command from the outside;
• host means of providing connection between the management apparatus and a network;
• a service section for performing at least one predetermined operation;
• a power source for supplying power at least to said host means and said service section;
• and
• power supply controlling means of controlling the power source to control a state of a power supply to said host means and said service section,
• wherein said management apparatus is configured to operate in a first mode in the absence of the off command such that said power source provides the power supply to said service section and said host means at an operational level,
• said management apparatus being configured to operate in a second mode upon receiving the off command such that said interface section sends a command to the service section to stop performing the at least one predetermined operation and said power supply controlling means turns power to the service section off, said interface section being configured to send a command to said host means to stop receiving reservations for conducting operations with target apparatuses connected to the network in said second mode, and the interface section checks an operational state of the host means in said second mode,
• wherein if said checked operational state corresponds to said host means communicating with a target apparatus connected to the network, a power supply to the host means is maintained at an operational level such that communications between said host means and said target apparatus continue, and
• wherein if said checked operational state corresponds to a storage section of the management apparatus including a schedule of future communications to be conducted between the host means and a target apparatus connected to the network, but not an active communication between the host means and the target apparatus, the power supply to the host means is reduced by the power supply controlling means to a level between said operational level and an unenergized level.