diff --git a/mcdp/src/ch/ntb/mcdp/uart/UartDispatch.java b/mcdp/src/ch/ntb/mcdp/uart/UartDispatch.java
index 791765c..24d8b96 100644
--- a/mcdp/src/ch/ntb/mcdp/uart/UartDispatch.java
+++ b/mcdp/src/ch/ntb/mcdp/uart/UartDispatch.java
@@ -13,16 +13,17 @@ import ch.ntb.usb.USBTimeoutException;
 public class UartDispatch {
 
 	/**
-	 * Maximal number of bytes allowed as UART payload. This value is specified
-	 * in <code>UART_INBUF_LEN</code> in the file <code>uart.h</code>.
+	 * Size of the UART buffer on the USB controller. <br>
+	 * This value is specified in <code>UART_BUF_LEN</code> in the file
+	 * <code>uart.h</code>.
 	 */
-	public static final int MAX_UART_PAYLOAD = 128;
+	public static final int UART_BUF_LEN = 256;
 
 	private static boolean running = false;
 
-	static Thread dispatchThread;
+	private static Thread dispatchThread;
 
-	static LinkedList<Uart> uarts = new LinkedList<Uart>();
+	private static LinkedList<Uart> uarts = new LinkedList<Uart>();
 
 	/**
 	 * Starts the read thread for all Uarts. If the thread is already running,
diff --git a/mcdp/src/ch/ntb/mcdp/uart/UartOutputStream.java b/mcdp/src/ch/ntb/mcdp/uart/UartOutputStream.java
index a83667b..a88fdba 100644
--- a/mcdp/src/ch/ntb/mcdp/uart/UartOutputStream.java
+++ b/mcdp/src/ch/ntb/mcdp/uart/UartOutputStream.java
@@ -36,7 +36,7 @@ public class UartOutputStream extends OutputStream {
 		}
 		int newLen = 0;
 		do {
-			newLen = Math.min(len, UartDispatch.MAX_UART_PAYLOAD);
+			newLen = Math.min(len, UartDispatch.UART_BUF_LEN);
 			byte[] data = new byte[newLen];
 			for (int i = 0; i < newLen; i++) {
 				data[i] = b[off + i];
@@ -47,6 +47,6 @@ public class UartOutputStream extends OutputStream {
 				throw new IOException(e.getMessage());
 			}
 			len -= newLen;
-		} while (len > UartDispatch.MAX_UART_PAYLOAD);
+		} while (len > UartDispatch.UART_BUF_LEN);
 	}
 }
diff --git a/mcdp/src/ch/ntb/mcdp/uart/blackbox/Uart0.java b/mcdp/src/ch/ntb/mcdp/uart/blackbox/Uart0.java
index 718d176..5ebb1ac 100644
--- a/mcdp/src/ch/ntb/mcdp/uart/blackbox/Uart0.java
+++ b/mcdp/src/ch/ntb/mcdp/uart/blackbox/Uart0.java
@@ -14,7 +14,7 @@ public class Uart0 {
 	 */
 	private static final byte STYPE_UART_0_IN = 0x11;
 
-	public static final int MAX_UART_PAYLOAD = UartDispatch.MAX_UART_PAYLOAD;
+	public static final int MAX_UART_PAYLOAD = UartDispatch.UART_BUF_LEN;
 
 	private static void write(byte packetSubType, byte[] data, int len)
 			throws USBException {
diff --git a/mcdp/src/ch/ntb/mcdp/uart/blackbox/test/UartTest.java b/mcdp/src/ch/ntb/mcdp/uart/blackbox/test/UartTest.java
index 0ecf2b2..d248bc8 100644
--- a/mcdp/src/ch/ntb/mcdp/uart/blackbox/test/UartTest.java
+++ b/mcdp/src/ch/ntb/mcdp/uart/blackbox/test/UartTest.java
@@ -30,7 +30,7 @@ public class UartTest {
 	}
 
 	static public void button1() {
-		byte[] buffer = new byte[UartDispatch.MAX_UART_PAYLOAD];
+		byte[] buffer = new byte[UartDispatch.UART_BUF_LEN];
 		for (int i = 0; i < buffer.length; i++) {
 			buffer[i] = (byte) ('0' + (i % ('z' - '0')));
 		}
diff --git a/mcdp/src/ch/ntb/mcdp/uart/test/UartTest.java b/mcdp/src/ch/ntb/mcdp/uart/test/UartTest.java
index b6c4e1b..14b64c8 100644
--- a/mcdp/src/ch/ntb/mcdp/uart/test/UartTest.java
+++ b/mcdp/src/ch/ntb/mcdp/uart/test/UartTest.java
@@ -15,7 +15,7 @@ public class UartTest {
 
 	static InputStream in;
 
-	static byte[] buffer = new byte[UartDispatch.MAX_UART_PAYLOAD];
+	static byte[] buffer = new byte[UartDispatch.UART_BUF_LEN];
 
 	public static void init() {
 
@@ -49,7 +49,7 @@ public class UartTest {
 	}
 
 	static public void button1() {
-		byte[] buffer = new byte[UartDispatch.MAX_UART_PAYLOAD];
+		byte[] buffer = new byte[UartDispatch.UART_BUF_LEN];
 		for (int i = 0; i < buffer.length; i++) {
 			buffer[i] = (byte) ('0' + (i % ('z' - '0')));
 		}
diff --git a/mcdp/src/ch/ntb/mcdp/usb/Dispatch.java b/mcdp/src/ch/ntb/mcdp/usb/Dispatch.java
index 5c6b016..63b7c56 100644
--- a/mcdp/src/ch/ntb/mcdp/usb/Dispatch.java
+++ b/mcdp/src/ch/ntb/mcdp/usb/Dispatch.java
@@ -8,7 +8,7 @@ import ch.ntb.usb.USB;
 import ch.ntb.usb.USBException;
 
 public class Dispatch {
-	
+
 	private static Logger logger = LogUtil.ch_ntb_mcdp_usb;
 
 	// Main Types
@@ -44,7 +44,7 @@ public class Dispatch {
 	 */
 	public static final byte STYPE_ERROR_PACKET_END = 0x72;
 
-	private static byte[] usbData = new byte[USB.MAX_DATA_SIZE];
+	private static byte[] usbData = new byte[USB.HIGHSPEED_MAX_BULK_PACKET_SIZE];
 
 	private static LinkedList<DataPacket> bdiData, uartData;
 
@@ -69,7 +69,8 @@ public class Dispatch {
 			}
 			mainType = data[index++];
 			subtype = data[index++];
-			int dataLen = (data[index++] & 0xFF) * 0x100 + (data[index++] & 0xFF);
+			int dataLen = (data[index++] & 0xFF) * 0x100
+					+ (data[index++] & 0xFF);
 			if (data[index + dataLen] != DataPacket.PACKET_END) {
 				throw new DispatchException("PACKET_END or packetLen ("
 						+ dataLen + " bytes) wrong");
@@ -118,7 +119,8 @@ public class Dispatch {
 		if (!bdiData.isEmpty()) {
 			return bdiData.poll();
 		}
-		int dataLength = USBDevice.read_BDI(usbData, USB.MAX_DATA_SIZE);
+		int dataLength = USBDevice.read_BDI(usbData, USBDevice
+				.getMaxPacketSize());
 		dispatch(usbData, dataLength);
 		return bdiData.poll();
 	}
@@ -128,7 +130,8 @@ public class Dispatch {
 			logger.info("buffer not empty");
 			return uartData.poll();
 		}
-		int dataLength = USBDevice.read_UART(usbData, USB.MAX_DATA_SIZE);
+		int dataLength = USBDevice.read_UART(usbData, USBDevice
+				.getMaxPacketSize());
 		dispatch(usbData, dataLength);
 		return uartData.poll();
 	}
diff --git a/mcdp/src/ch/ntb/mcdp/usb/USBDevice.java b/mcdp/src/ch/ntb/mcdp/usb/USBDevice.java
index d6368bd..843fe0f 100644
--- a/mcdp/src/ch/ntb/mcdp/usb/USBDevice.java
+++ b/mcdp/src/ch/ntb/mcdp/usb/USBDevice.java
@@ -27,11 +27,10 @@ public class USBDevice {
 	private static final int BDI_Timeout = 1000;
 
 	private static final int UART_Timeout = 50;
-	
+
 	private static Device dev;
 
 	static {
-		// set data for our device
 		dev = USB.getDevice(IdVendor, IdProduct);
 	}
 
@@ -51,8 +50,7 @@ public class USBDevice {
 		dev.bulkwrite(OUT_Endpoint_BDI, data, length, BDI_Timeout);
 	}
 
-	public static synchronized int read_BDI(byte[] data, int size)
-			throws USBException {
+	public static int read_BDI(byte[] data, int size) throws USBException {
 		return dev.bulkread(IN_Endpoint_BDI, data, size, BDI_Timeout);
 	}
 
@@ -60,8 +58,15 @@ public class USBDevice {
 		dev.bulkwrite(OUT_Endpoint_UART, data, length, UART_Timeout);
 	}
 
-	public static synchronized int read_UART(byte[] data, int size)
-			throws USBException {
+	public static int read_UART(byte[] data, int size) throws USBException {
 		return dev.bulkread(IN_Endpoint_UART, data, size, UART_Timeout);
 	}
+
+	public static int getMaxPacketSize() {
+		return dev.getMaxPacketSize();
+	}
+
+	public static Device getDevice() {
+		return dev;
+	}
 }