Index: /trunk/BNC/bnchelp.html
===================================================================
--- /trunk/BNC/bnchelp.html	(revision 1421)
+++ /trunk/BNC/bnchelp.html	(revision 1422)
@@ -568,4 +568,7 @@
 SunOS/Solaris: /dev/ttya, /dev/ttyb
 </pre>
+<p>
+Note that you must plug a serial cable in the port defined here before you start BNC.
+</p>
 
 <p><a name="serbaud"><h4>3.9.3 Baud Rate - mandatory if 'Mountpoint' is set</h4></p>
Index: /trunk/BNC/bncwindow.cpp
===================================================================
--- /trunk/BNC/bncwindow.cpp	(revision 1421)
+++ /trunk/BNC/bncwindow.cpp	(revision 1422)
@@ -339,5 +339,5 @@
   _scanRTCMCheckBox->setWhatsThis(tr("<p>Tick 'Scan RTCM' to log the numbers of incomming message types as well as contained antenna coordinates, antenna heigt, and antenna descriptor.</p><p>An empty option field (default) means that you don't want BNC to log such information.</p>"));
   _serialMountPointLineEdit->setWhatsThis(tr("<p>Enter a 'Mountpoint' to forward the corresponding stream to a serial connected device.</p>"));
-  _serialPortNameLineEdit->setWhatsThis(tr("<p>Enter the serial 'Port name' selected for communication with your serial connected device. Valid port names are</p><pre>Windows:       COM1, COM2<br>Linux:         /dev/ttyS0, /dev/ttyS1<br>FreeBSD:       /dev/ttyd0, /dev/ttyd1<br>Digital Unix:  /dev/tty01, /dev/tty02<br>HP-UX:         /dev/tty1p0, /dev/tty2p0<br>SGI/IRIX:      /dev/ttyf1, /dev/ttyf2<br>SunOS/Solaris: /dev/ttya, /dev/ttyb</pre>"));
+  _serialPortNameLineEdit->setWhatsThis(tr("<p>Enter the serial 'Port name' selected for communication with your serial connected device. Valid port names are</p><pre>Windows:       COM1, COM2<br>Linux:         /dev/ttyS0, /dev/ttyS1<br>FreeBSD:       /dev/ttyd0, /dev/ttyd1<br>Digital Unix:  /dev/tty01, /dev/tty02<br>HP-UX:         /dev/tty1p0, /dev/tty2p0<br>SGI/IRIX:      /dev/ttyf1, /dev/ttyf2<br>SunOS/Solaris: /dev/ttya, /dev/ttyb</pre><p>Note that you must plug a serial cable in the port defined here before you start BNC.</p>"));
   _serialBaudRateComboBox->setWhatsThis(tr("<p>Select a 'Baud rate' for the serial link.</p><p>Note that your selection must equal the baud rate configured to the serial connected device. Note further that using a high baud rate is recommended.</p>"));
   _serialParityComboBox->setWhatsThis(tr("<p>Select the 'Parity' for the serial link.</p><p>Note that your selection must equal the parity selection configured to the serial connected device. Note further that parity is often set to 'NONE'.</p>"));