TX2_B_MARK
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,
RX2_B_MARK, TX2_B_MARK,