Patent ID: 7650388

Claim:
A method of confirming completion of data transmission from a wireless identification system to a replaceable unit monitor, the wireless identification system including a host processor and a coupler board, the coupler board interfacing between the host processor and the replaceable unit monitor, the method comprising: transmitting data from the coupler board to the replaceable unit monitor, wherein the replaceable unit monitor includes a radio frequency identification tag, and transmitting data from the coupler board to the radio frequency identification tag is via modulated radio frequency signal; and receiving at the coupler board a signal from the replaceable unit monitor affirmatively indicating the success or failure of the data transmission, the signal being an acknowledgement signal signifying success if the data transmission is completed successfully, and a no-acknowledgement signal signifying failure if the data transmission falls, the data transmission being a write cycle, wherein receiving acknowledgement signal or no-acknowledgement signal comprises establishing a no-response condition if no signal is received from the replaceable unit monitor within a predetermined amount of time and changing a value of a register in a memory of the coupler board from a default value to an updated value to indicate the no response condition, the register being accessible by the host processor; and the coupler board includes a timer and measure a delay time allowing the coupler board to switch from a transmitter mode to a receiver mode at least for the purpose of listening for a response from the radio frequency identification tag.