To reduce the number and cost of optical network units in fiber-to-the-room systems, a half-duplex transceiver solution is proposed. This solution realizes the transceiver function of the communication system by connecting different circuit components through a mode switch. At the same time, the transceiver is used together with the WiFi wireless transceiver system to forma "fiber-wireless" half-duplex transceiver system architecture, enabling the transmission of optical signals and radio frequency signalsin the fiber-to-the-room system. The test results show that the designed mode switch and transceiver work smoothly together,and the signal eye diagram at the receiving end is clear when the data transmission rate is 5 Gb/s, verifying the feasibility of thehalf-duplex transceiver solution.