diff --git a/omci_defs.go b/omci_defs.go
index 44347ef..d84e878 100644
--- a/omci_defs.go
+++ b/omci_defs.go
@@ -28,12 +28,16 @@
 type ChMessageType int
 
 const (
-	GemPortAdded ChMessageType = iota
+	GemPortAdded ChMessageType = 0
+	UniLinkUp ChMessageType = 1
+	UniLinkDown ChMessageType = 2
 )
 
 func (m ChMessageType) String() string {
 	names := [...]string{
 		"GemPortAdded",
+		"UniLinkUp",
+		"UniLinkDown",
 	}
 	return names[m]
 }
@@ -46,6 +50,7 @@
 type OmciChMessage struct {
 	Type ChMessageType
 	Data OmciChMessageData
+	Packet []byte
 }
 
 //