Electronic apparatus, presence communication system, and computer-readable recording medium

A presence communication system, comprising:

• a presence server which manages a communication state of a communication apparatus;
• and
• an electronic apparatus which communicates via a plurality of communication networks including a first communication network and a second communication network being different from the first communication network, wherein
• the presence server transmits presence information indicating a communication state of an alternate communication apparatus being as a communication apparatus which communicates via the second communication network in place of the second communication unit, to the electronic apparatus, and
• the electronic apparatus, comprises:
• a plurality of communication units including a first communication unit which communicates via the first communication network and a second communication unit which communicates via the second communication network;
• a presence information acquiring unit which acquires presence information of the alternate communication apparatus transmitted by the presence server, via at least one of a plurality of the communication networks;
• an online determining unit which determines as to whether the alternate communication apparatus is in an online state, based on the presence information acquired by the presence information acquiring unit;
• and
• a consumed electric power controlling unit which suppresses electric power to be consumed by the second communication unit, when the online determining unit determines that the alternate communication apparatus is in an online state.

A non-transitory computer-readable recording medium storing a program which causes a computer, comprising a plurality of communication units including a first communication unit which communicates via a first communication network and a second communication unit which communicates via a second communication network being different from the first communication network, and communicating via a plurality of communication networks including the first communication network and the second communication network, to execute:

• a presence information acquiring step of acquiring presence information indicating a communication state of an alternate communication apparatus being as a communication apparatus which communicates via the second communication network in place of the second communication unit;
• an online determining step of determining as to whether the alternate communication apparatus is in an online state, based on the presence information acquired in the presence information acquiring step;
• and
• a consumed electric power controlling step which suppresses electric power to be consumed by the second communication unit, when it is determined that the alternate communication apparatus is in an online state in the online determining step.