diff --git a/bundles/org.openhab.binding.benqprojector/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.benqprojector/src/main/resources/OH-INF/thing/thing-types.xml
index 4bf9876508b..b8e99384f33 100644
--- a/bundles/org.openhab.binding.benqprojector/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.benqprojector/src/main/resources/OH-INF/thing/thing-types.xml
@@ -23,6 +23,7 @@
 			<parameter name="serialPort" type="text" required="true">
 				<label>Serial Port</label>
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<description>Serial Port to Use for Connecting to the BenQ Projector</description>
 			</parameter>
 			<parameter name="pollingInterval" type="integer" min="5" max="60" unit="s" required="false">
diff --git a/bundles/org.openhab.binding.caddx/src/main/resources/OH-INF/thing/bridge.xml b/bundles/org.openhab.binding.caddx/src/main/resources/OH-INF/thing/bridge.xml
index 663cb0b532a..0d353f670c4 100644
--- a/bundles/org.openhab.binding.caddx/src/main/resources/OH-INF/thing/bridge.xml
+++ b/bundles/org.openhab.binding.caddx/src/main/resources/OH-INF/thing/bridge.xml
@@ -18,6 +18,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="true">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Caddx Bridge Serial Port</label>
 				<description>The serial port name for the communication. Valid values
 					are e.g. COM1 for Windows and /dev/ttyS0 or
diff --git a/bundles/org.openhab.binding.comfoair/src/main/resources/OH-INF/config/config.xml b/bundles/org.openhab.binding.comfoair/src/main/resources/OH-INF/config/config.xml
index 7210e8a4860..5f5f08444c1 100644
--- a/bundles/org.openhab.binding.comfoair/src/main/resources/OH-INF/config/config.xml
+++ b/bundles/org.openhab.binding.comfoair/src/main/resources/OH-INF/config/config.xml
@@ -9,6 +9,7 @@
 		<parameter name="serialPort" type="text" required="true">
 			<label>Serial Port</label>
 			<context>serial-port</context>
+			<limitToOptions>false</limitToOptions>
 			<description>Serial port that the ComfoAir is connected to</description>
 		</parameter>
 		<parameter name="refreshInterval" type="integer" max="65535" min="10" unit="s" required="false">
diff --git a/bundles/org.openhab.binding.digiplex/src/main/resources/OH-INF/thing/bridge.xml b/bundles/org.openhab.binding.digiplex/src/main/resources/OH-INF/thing/bridge.xml
index 2bf83c7c8eb..9f40dfc120d 100644
--- a/bundles/org.openhab.binding.digiplex/src/main/resources/OH-INF/thing/bridge.xml
+++ b/bundles/org.openhab.binding.digiplex/src/main/resources/OH-INF/thing/bridge.xml
@@ -29,7 +29,6 @@
 
 			<parameter name="baudrate" type="integer" required="true" groupName="port">
 				<label>Baud Rate</label>
-				<context>serial-port</context>
 				<description>Set the serial port baud rate</description>
 				<default>2400</default>
 				<limitToOptions>true</limitToOptions>
diff --git a/bundles/org.openhab.binding.epsonprojector/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.epsonprojector/src/main/resources/OH-INF/thing/thing-types.xml
index afcc25e589b..4f28d375be2 100644
--- a/bundles/org.openhab.binding.epsonprojector/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.epsonprojector/src/main/resources/OH-INF/thing/thing-types.xml
@@ -43,6 +43,7 @@
 			<parameter name="serialPort" type="text" required="true">
 				<label>Serial Port</label>
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<description>Serial Port to Use for Connecting to the Epson Projector</description>
 			</parameter>
 			<parameter name="pollingInterval" type="integer" min="5" max="60" unit="s" required="false">
diff --git a/bundles/org.openhab.binding.heliosventilation/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.heliosventilation/src/main/resources/OH-INF/thing/thing-types.xml
index db4dada09df..3799d0f9255 100644
--- a/bundles/org.openhab.binding.heliosventilation/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.heliosventilation/src/main/resources/OH-INF/thing/thing-types.xml
@@ -41,6 +41,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="true">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>RS485 Interface Serial Port</label>
 				<description>The serial port name for the RS485 interfaces. Valid values are e.g. COM1 for Windows and /dev/ttyS0 or
 					/dev/ttyUSB0 for Linux.</description>
diff --git a/bundles/org.openhab.binding.herzborg/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.herzborg/src/main/resources/OH-INF/thing/thing-types.xml
index 994ea745289..1803313987d 100644
--- a/bundles/org.openhab.binding.herzborg/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.herzborg/src/main/resources/OH-INF/thing/thing-types.xml
@@ -10,8 +10,8 @@
 			<parameter name="port" type="text" required="true">
 				<label>Serial Port</label>
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<description>Serial port to use, for example /dev/ttyS0 or COM1</description>
-				<default>/dev/ttyS0</default>
 			</parameter>
 		</config-description>
 	</bridge-type>
diff --git a/bundles/org.openhab.binding.kaleidescape/src/main/resources/OH-INF/config/config.xml b/bundles/org.openhab.binding.kaleidescape/src/main/resources/OH-INF/config/config.xml
index 0d851f32c07..bc1feac9b2a 100644
--- a/bundles/org.openhab.binding.kaleidescape/src/main/resources/OH-INF/config/config.xml
+++ b/bundles/org.openhab.binding.kaleidescape/src/main/resources/OH-INF/config/config.xml
@@ -18,6 +18,7 @@
 		</parameter>
 		<parameter name="serialPort" type="text" required="false">
 			<context>serial-port</context>
+			<limitToOptions>false</limitToOptions>
 			<label>Serial Port</label>
 			<description>(Optional) Serial Port to use for connecting directly to an individual Kaleidescape component.</description>
 			<advanced>true</advanced>
diff --git a/bundles/org.openhab.binding.monopriceaudio/src/main/resources/OH-INF/thing/channels.xml b/bundles/org.openhab.binding.monopriceaudio/src/main/resources/OH-INF/thing/channels.xml
index 1e51479668b..105a14f491e 100644
--- a/bundles/org.openhab.binding.monopriceaudio/src/main/resources/OH-INF/thing/channels.xml
+++ b/bundles/org.openhab.binding.monopriceaudio/src/main/resources/OH-INF/thing/channels.xml
@@ -93,6 +93,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="false">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Serial Port</label>
 				<description>Serial Port to Use for Connecting to the Monoprice Amplifier</description>
 			</parameter>
diff --git a/bundles/org.openhab.binding.nuvo/src/main/resources/OH-INF/thing/channels.xml b/bundles/org.openhab.binding.nuvo/src/main/resources/OH-INF/thing/channels.xml
index 462c61cb87a..cb51cf03d7d 100644
--- a/bundles/org.openhab.binding.nuvo/src/main/resources/OH-INF/thing/channels.xml
+++ b/bundles/org.openhab.binding.nuvo/src/main/resources/OH-INF/thing/channels.xml
@@ -125,6 +125,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="false">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Serial Port</label>
 				<description>Serial Port to use for connecting to the Nuvo amplifier</description>
 			</parameter>
diff --git a/bundles/org.openhab.binding.openwebnet/src/main/resources/OH-INF/thing/ZBGateway.xml b/bundles/org.openhab.binding.openwebnet/src/main/resources/OH-INF/thing/ZBGateway.xml
index 8dbc22b4aca..132c7cb779e 100644
--- a/bundles/org.openhab.binding.openwebnet/src/main/resources/OH-INF/thing/ZBGateway.xml
+++ b/bundles/org.openhab.binding.openwebnet/src/main/resources/OH-INF/thing/ZBGateway.xml
@@ -22,6 +22,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="true">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Serial Port</label>
 				<description>Serial port where the OpenWebNet ZigBee USB Gateway is connected. Example: COM3 (Win), /dev/ttyUSB0
 					(Linux), etc.</description>
diff --git a/bundles/org.openhab.binding.oppo/src/main/resources/OH-INF/thing/channels.xml b/bundles/org.openhab.binding.oppo/src/main/resources/OH-INF/thing/channels.xml
index a32ac5c0ca2..181588aa193 100644
--- a/bundles/org.openhab.binding.oppo/src/main/resources/OH-INF/thing/channels.xml
+++ b/bundles/org.openhab.binding.oppo/src/main/resources/OH-INF/thing/channels.xml
@@ -55,6 +55,7 @@
 			</parameter>
 			<parameter name="serialPort" type="text" required="false">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Serial Port</label>
 				<description>Serial Port to Use for Connecting to the Oppo Player.</description>
 			</parameter>
diff --git a/bundles/org.openhab.binding.proteusecometer/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.proteusecometer/src/main/resources/OH-INF/thing/thing-types.xml
index 72cf68f730c..5721e4b07c9 100644
--- a/bundles/org.openhab.binding.proteusecometer/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.proteusecometer/src/main/resources/OH-INF/thing/thing-types.xml
@@ -19,6 +19,7 @@
 		<config-description>
 			<parameter name="usbPort" type="text" required="true">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>USB Port</label>
 				<description>USB port the device is connected to i.e. /dev/ttyUSB0</description>
 			</parameter>
diff --git a/bundles/org.openhab.binding.serial/src/main/resources/OH-INF/thing/thing-types.xml b/bundles/org.openhab.binding.serial/src/main/resources/OH-INF/thing/thing-types.xml
index a7249ea48dc..09a67ec444a 100644
--- a/bundles/org.openhab.binding.serial/src/main/resources/OH-INF/thing/thing-types.xml
+++ b/bundles/org.openhab.binding.serial/src/main/resources/OH-INF/thing/thing-types.xml
@@ -18,6 +18,7 @@
 		<config-description>
 			<parameter name="serialPort" type="text" required="true">
 				<context>serial-port</context>
+				<limitToOptions>false</limitToOptions>
 				<label>Serial Port</label>
 				<description>The serial port to use (e.g. Linux: /dev/ttyUSB0, Windows: COM1)</description>
 			</parameter>