Patent ID: 7715033

Claim:
A recording apparatus for communicating with an image supply device using a predetermined protocol, comprising: a communication unit constructed to communicate with the image supply device in accordance with a communication procedure of the predetermined protocol; a capability transmission unit constructed to transmit capability information of the recording apparatus to the image supply device upon establishing communication with the image supply device by the communication unit; a capability changed information transmission unit constructed to transmit capability changed information for indicating that a capability of the recording apparatus has changed, when the capability of the recording apparatus has changed; a new capability transmission unit constructed to transmit new capability information of the recording apparatus after transmitting the capability changed information by the capability changed information transmission unit; an estimation unit constructed to estimate whether or not the image supply device has a function corresponding to the capability changed information, in a case that the recording apparatus can not obtain information indicating whether or not the image supply device has the function corresponding to the capability changed information; and a control unit constructed to (i) cause the new capability transmission unit to transmit the new capability information of the recording apparatus to the image supply device without breaking communication with the image supply device if the estimation unit estimates that the image supply device has the function corresponding to the capability changed information, and (ii) to cause the communication unit to break communication with the image supply device and then to cause said communication unit to establish communication with the image supply device again and to cause the capability transmission unit to transmit the capability information of the recording apparatus to the image supply device, if the estimation unit estimates that the image supply device does not have the function corresponding to the capability changed information and the capability of the recording apparatus has changed.