diff --git a/internal/core/translation.go b/internal/core/translation.go
index 634272c..ef6582d 100644
--- a/internal/core/translation.go
+++ b/internal/core/translation.go
@@ -18,15 +18,15 @@
 
 import (
 	"fmt"
+	"time"
 
 	"github.com/opencord/voltha-protos/v5/go/common"
 	"github.com/opencord/voltha-protos/v5/go/voltha"
 )
 
 const (
-	DeviceAggregationModel = "bbf-device-aggregation"
-	DevicesPath            = "/" + DeviceAggregationModel + ":devices"
-	HardwarePath           = "data/ietf-hardware:hardware"
+	DeviceAggregationModule = "bbf-device-aggregation"
+	DevicesPath             = "/" + DeviceAggregationModule + ":devices"
 
 	//Device types
 	DeviceTypeOlt = "bbf-device-types:olt"
@@ -42,6 +42,13 @@
 	ietfOperStateDisabled = "disabled"
 	ietfOperStateEnabled  = "enabled"
 	ietfOperStateTesting  = "testing"
+	ietfOperStateUp       = "up"
+	ietfOperStateDown     = "down"
+
+	//Keys of useful values in device events
+	eventContextKeyPonId = "pon-id"
+	eventContextKeyOnuSn = "serial-number"
+	eventContextKeyOltSn = "olt-serial-number"
 )
 
 type YangItem struct {
@@ -56,7 +63,7 @@
 
 //getDevicePath returns the yang path to the root of the device's hardware module in its data mountpoint
 func getDeviceHardwarePath(id string) string {
-	return fmt.Sprintf("%s/device[name='%s']/%s/component[name='%s']", DevicesPath, id, HardwarePath, id)
+	return fmt.Sprintf("%s/device[name='%s']/data/ietf-hardware:hardware/component[name='%s']", DevicesPath, id, id)
 }
 
 //ietfHardwareAdminState returns the string that represents the ietf-hardware admin state
@@ -101,8 +108,30 @@
 	return ietfOperStateUnknown
 }
 
+//ietfHardwareOperState returns the string that represents the ietf-interfaces oper state
+//enum value corresponding to the one of VOLTHA
+func ietfInterfacesOperState(volthaOperState voltha.OperStatus_Types) string {
+	//TODO: verify this mapping is correct
+	switch volthaOperState {
+	case common.OperStatus_UNKNOWN:
+		return ietfOperStateUnknown
+	case common.OperStatus_TESTING:
+		return ietfOperStateTesting
+	case common.OperStatus_ACTIVE:
+		return ietfOperStateUp
+	case common.OperStatus_DISCOVERED:
+	case common.OperStatus_ACTIVATING:
+	case common.OperStatus_FAILED:
+	case common.OperStatus_RECONCILING:
+	case common.OperStatus_RECONCILING_FAILED:
+		return ietfOperStateDown
+	}
+
+	return ietfOperStateUnknown
+}
+
 //translateDevice returns a slice of yang items that represent a voltha device
-func translateDevice(device voltha.Device) []YangItem {
+func translateDevice(device *voltha.Device) []YangItem {
 	devicePath := getDevicePath(device.Id)
 	hardwarePath := getDeviceHardwarePath(device.Id)
 
@@ -110,70 +139,148 @@
 
 	//Device type
 	if device.Root {
+		//OLT
 		result = append(result, YangItem{
-			Path:  fmt.Sprintf("%s/type", devicePath),
+			Path:  devicePath + "/type",
 			Value: DeviceTypeOlt,
 		})
 	} else {
+		//ONU
 		result = append(result, YangItem{
-			Path:  fmt.Sprintf("%s/type", devicePath),
+			Path:  devicePath + "/type",
 			Value: DeviceTypeOnu,
 		})
 	}
 
 	//Vendor name
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/mfg-name", hardwarePath),
+		Path:  hardwarePath + "/mfg-name",
 		Value: device.Vendor,
 	})
 
 	//Model
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/model-name", hardwarePath),
+		Path:  hardwarePath + "/model-name",
 		Value: device.Model,
 	})
 
 	//Hardware version
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/hardware-rev", hardwarePath),
+		Path:  hardwarePath + "/hardware-rev",
 		Value: device.HardwareVersion,
 	})
 
 	//Firmware version
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/firmware-rev", hardwarePath),
+		Path:  hardwarePath + "/firmware-rev",
 		Value: device.FirmwareVersion,
 	})
 
 	//Serial number
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/serial-num", hardwarePath),
+		Path:  hardwarePath + "/serial-num",
 		Value: device.SerialNumber,
 	})
 
 	//Administrative state
 	//Translates VOLTHA admin state enum to ietf-hardware enum
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/state/admin-state", hardwarePath),
+		Path:  hardwarePath + "/state/admin-state",
 		Value: ietfHardwareAdminState(device.AdminState),
 	})
 
 	//Operative state
 	result = append(result, YangItem{
-		Path:  fmt.Sprintf("%s/state/oper-state", hardwarePath),
+		Path:  hardwarePath + "/state/oper-state",
 		Value: ietfHardwareOperState(device.OperStatus),
 	})
 
 	return result
 }
 
-//translateDevices returns a slice of yang items that represent a list of voltha devices
-func translateDevices(devices voltha.Devices) []YangItem {
+//translateOnuPorts returns a slice of yang items that represent the UNIs of an ONU
+func translateOnuPorts(deviceId string, ports *voltha.Ports) ([]YangItem, error) {
+	interfacesPath := getDevicePath(deviceId) + "/data/ietf-interfaces:interfaces"
 	result := []YangItem{}
 
-	for _, device := range devices.Items {
-		result = append(result, translateDevice(*device)...)
+	for _, port := range ports.Items {
+		if port.Type == voltha.Port_ETHERNET_UNI {
+			if port.OfpPort == nil {
+				return nil, fmt.Errorf("no-ofp-port-in-uni: %s %d", deviceId, port.PortNo)
+			}
+
+			interfacePath := fmt.Sprintf("%s/interface[name='%s']", interfacesPath, port.OfpPort.Name)
+
+			result = append(result, []YangItem{
+				{
+					Path:  interfacePath + "/type",
+					Value: "bbf-xpon-if-type:onu-v-vrefpoint",
+				},
+				{
+					Path:  interfacePath + "/oper-status",
+					Value: ietfInterfacesOperState(port.OperStatus),
+				},
+			}...)
+		}
 	}
 
-	return result
+	return result, nil
+}
+
+//TranslateOnuActivatedEvent returns a slice of yang items and the name of the channel termination to populate
+//an ONU discovery notification with data from ONU_ACTIVATED_RAISE_EVENT coming from the Kafka bus
+func TranslateOnuActivatedEvent(eventHeader *voltha.EventHeader, deviceEvent *voltha.DeviceEvent) (notification []YangItem, channelTermination []YangItem, err error) {
+
+	//TODO: the use of this notification, which requires the creation of a dummy channel termination node,
+	//is temporary, and will be substituted with a more fitting one as soon as it will be defined
+
+	//Check if the needed information is present
+	ponId, ok := deviceEvent.Context[eventContextKeyPonId]
+	if !ok {
+		return nil, nil, fmt.Errorf("missing-key-from-event-context: %s", eventContextKeyPonId)
+	}
+	oltId, ok := deviceEvent.Context[eventContextKeyOltSn]
+	if !ok {
+		return nil, nil, fmt.Errorf("missing-key-from-event-context: %s", eventContextKeyPonId)
+	}
+	ponName := oltId + "-pon-" + ponId
+
+	onuSn, ok := deviceEvent.Context[eventContextKeyOnuSn]
+	if !ok {
+		return nil, nil, fmt.Errorf("missing-key-from-event-context: %s", eventContextKeyOnuSn)
+	}
+
+	notificationPath := "/bbf-xpon-onu-states:onu-state-change"
+
+	notification = []YangItem{
+		{
+			Path:  notificationPath + "/detected-serial-number",
+			Value: onuSn,
+		},
+		{
+			Path:  notificationPath + "/channel-termination-ref",
+			Value: ponName,
+		},
+		{
+			Path:  notificationPath + "/onu-state-last-change",
+			Value: eventHeader.RaisedTs.AsTime().Format(time.RFC3339),
+		},
+		{
+			Path:  notificationPath + "/onu-state",
+			Value: "bbf-xpon-onu-types:onu-present",
+		},
+		{
+			Path:  notificationPath + "/detected-registration-id",
+			Value: deviceEvent.ResourceId,
+		},
+	}
+
+	channelTermination = []YangItem{
+		{
+			Path:  fmt.Sprintf("/ietf-interfaces:interfaces/interface[name='%s']/type", ponName),
+			Value: "bbf-if-type:vlan-sub-interface",
+		},
+	}
+
+	return notification, channelTermination, nil
 }