diff --git a/src/USB_PortTypes.ttcn b/src/USB_PortTypes.ttcn
index d6262a0..39d7c31 100644
--- a/src/USB_PortTypes.ttcn
+++ b/src/USB_PortTypes.ttcn
@@ -122,4 +122,65 @@ module USB_PortTypes {
 		integer result_code,
 		octetstring data
 	};
+
+
+template (value) USB_open_vid_pid
+ts_USB_open_vid_pid(USB_vendor_id vid, USB_product_id pid, integer device_hdl := -1,
+		    integer req_hdl := -1) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	vendor_id := vid,
+	product_id := pid
+}
+
+template USB_result tr_USB_result(template integer req_hdl := ?, template integer device_hdl := ?,
+				  template integer result_code := ?) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	result_code := result_code
+}
+
+template (value) USB_claim_interface
+ts_USB_claim_interface(integer device_hdl, integer bInterface, integer req_hdl := -1) :=
+{
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	interface := bInterface
+}
+
+template (value) USB_get_device_descriptor
+ts_USB_get_device_descriptor(integer device_hdl, integer req_hdl := -1) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl
+}
+
+template (value) USB_get_config_descriptor
+ts_USB_get_config_descriptor(integer device_hdl, integer config_index, integer req_hdl := -1) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	config_index := config_index
+}
+
+template (value) USB_get_active_config_descriptor
+ts_USB_get_active_config_descriptor(integer device_hdl, integer req_hdl := -1) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl
+}
+
+template (value) USB_get_config_descriptor_by_value
+ts_USB_get_config_descriptor_by_value(integer device_hdl, integer cfg_val, integer req_hdl := -1) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	config_value := cfg_val
+}
+
+template USB_descriptor
+tr_USB_descriptor(template integer device_hdl :=?, template integer req_hdl := ?,
+		  template integer result_code := ?, template octetstring data := ?) := {
+	req_hdl := req_hdl,
+	device_hdl := device_hdl,
+	result_code := result_code,
+	data := data
+}
+
 };