static Message MessagePollResponse = new Message(DeviceAddress.CDChanger, DeviceAddress.Broadcast, 0x02, 0x00);
static Message MessageAnnounce = new Message(DeviceAddress.CDChanger, DeviceAddress.Broadcast, 0x02, 0x01);
static Message MessagePlayingDisk1Track1 = new Message(DeviceAddress.CDChanger, DeviceAddress.Radio, 0x39, 0x00, 0x09, 0x00, 0x3F, 0x00, 0x01, 0x01);

static byte[] DataPollRequest = new byte[] { 0x01 };
static byte[] DataCurrentDiskTrackRequest = new byte[] { 0x38, 0x00, 0x00 };

// тут всякая неважная хрень

static void ProcessCDCMessage(Message m)
{
    if (m.Data.Compare(MessageAnnounce.Data))
    {
        if (announceThread.ThreadState == ThreadState.Suspended)
        {
            announceThread.Resume();
        }
        Debug.Print("iBus activated");
    }
    else if (m.Data.Compare(DataPollRequest))
    {
        /*if (announceThread.ThreadState != ThreadState.Suspended)
        {
            announceThread.Suspend();
        }*/

        Manager.EnqueueMessage(MessagePollResponse);

        Manager.EnqueueMessage(MessagePlayingDisk1Track1);

        Debug.Print("Radio polled");
    }
    else if (m.Data.Compare(DataCurrentDiskTrackRequest))
    {
        Manager.EnqueueMessage(MessagePlayingDisk1Track1);
        Debug.Print("Radio requested disk&track");
    }
}

static void announce()
{
    while (true)
    {
        Manager.EnqueueMessage(MessageAnnounce);

        Manager.EnqueueMessage(MessagePollResponse);

        Thread.Sleep(30000);
    }
}