Image forming apparatus, image-forming-apparatus remote system, and method for remotely displaying operation screen of image forming apparatus

A image-forming-apparatus remote system including a remote operation terminal, an image forming apparatus, and an SIP server,

• the remote control terminal comprising:
• a remote-operation request message transmitting part that transmits a remote-operation request message to the image forming apparatus;
• a remote-operation response message receiving part that receives a remote-operation response message from the image forming apparatus;
• an operation-screen information receiving part that receives operation screen information from the image forming apparatus;
• and
• an operation screen display part that displays an operation screen of the image forming apparatus based on the received operation screen information,
• the image forming apparatus comprising:
• a remote-operation request message receiving part that receives the remote-operation request message from the remote control terminal;
• a remote-operation response message transmitting part that transmits a remote-operation response message to the remote operation terminal;
• and
• an operation-screen information transmitting part that transmits the operation screen information to the remote operation terminal, and
• the SIP server comprising:
• a communication session establishing part that establishes an SIP-based communication session between the remote operation terminal and the image forming apparatus by relaying the remote-operation request message and the remote-operation response message,
• wherein when the SIP-based communication session is established between the remote operation terminal and the image forming apparatus, the operation-screen information transmitting part transmits the operation screen information to the remote operation terminal in accordance with a communication condition of the communication session.

An operation-screen remote display method for an image forming apparatus connected to a remote operation terminal by SIP, the method comprising:

• a remote-operation request message receiving step of receiving a remote-operation request message from the remote control terminal;
• a remote-operation response message transmitting step of transmitting a remote-operation response message in response to the remote-operation request message;
• and
• an operation-screen information transmitting step of, transmitting operation screen information of the image forming apparatus to the remote operation terminal in accordance with a communication condition of the communication session when an SIP-based communication session is established between the remote operation terminal and the image forming apparatus.