diff --git a/adaptercoreont/omci_cc.go b/adaptercoreont/omci_cc.go
new file mode 100644
index 0000000..17e7e40
--- /dev/null
+++ b/adaptercoreont/omci_cc.go
@@ -0,0 +1,609 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//Package adaptercoreont provides the utility for onu devices, flows and statistics
+package adaptercoreont
+
+import (
+	"container/list"
+	"context"
+	"encoding/binary"
+	"encoding/hex"
+	"errors"
+	"sync"
+
+	//"time"
+
+	"github.com/google/gopacket"
+	// TODO!!! Some references could be resolved auto, but some need specific context ....
+	gp "github.com/google/gopacket"
+
+	"github.com/opencord/omci-lib-go"
+	me "github.com/opencord/omci-lib-go/generated"
+	"github.com/opencord/voltha-lib-go/v3/pkg/adapters/adapterif"
+
+	//"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	//"github.com/opencord/voltha-protos/v3/go/openflow_13"
+	//"github.com/opencord/voltha-protos/v3/go/voltha"
+)
+
+const ConstDefaultOmciTimeout = 10 // ( 3 ?) Seconds
+
+//CallbackPair to be used for ReceiveCallback init
+type CallbackPair struct {
+	cbKey      uint16
+	cbFunction func(*omci.OMCI, *gp.Packet) error
+}
+
+type omciTransferStructure struct {
+	txFrame  []byte
+	timeout  int
+	retry    int
+	highPrio bool
+}
+
+//OmciCC structure holds information needed for OMCI communication (to/from OLT Adapter)
+type OmciCC struct {
+	enabled            bool
+	pOnuDeviceEntry    *OnuDeviceEntry
+	deviceID           string
+	pBaseDeviceHandler *DeviceHandler
+	coreProxy          adapterif.CoreProxy
+	adapterProxy       adapterif.AdapterProxy
+	supportExtMsg      bool
+	//txRequest
+	//rxResponse
+	//pendingRequest
+	txFrames, txOnuFrames                uint32
+	rxFrames, rxOnuFrames, rxOnuDiscards uint32
+
+	// OMCI params
+	mutexTid       sync.Mutex
+	tid            uint16
+	mutexHpTid     sync.Mutex
+	hpTid          uint16
+	uploadSequNo   uint16
+	uploadNoOfCmds uint16
+
+	mutexTxQueue    sync.Mutex
+	txQueue         *list.List
+	mutexRxSchedMap sync.Mutex
+	rxSchedulerMap  map[uint16]func(*omci.OMCI, *gp.Packet) error
+}
+
+//NewOmciCC constructor returns a new instance of a OmciCC
+//mib_db (as well as not inluded alarm_db not really used in this code? VERIFY!!)
+func NewOmciCC(ctx context.Context, onu_device_entry *OnuDeviceEntry,
+	device_id string, device_handler *DeviceHandler,
+	core_proxy adapterif.CoreProxy, adapter_proxy adapterif.AdapterProxy) *OmciCC {
+	log.Infow("init-omciCC", log.Fields{"deviceId": device_id})
+	var omciCC OmciCC
+	omciCC.enabled = false
+	omciCC.pOnuDeviceEntry = onu_device_entry
+	omciCC.deviceID = device_id
+	omciCC.pBaseDeviceHandler = device_handler
+	omciCC.coreProxy = core_proxy
+	omciCC.adapterProxy = adapter_proxy
+	omciCC.supportExtMsg = false
+	omciCC.txFrames = 0
+	omciCC.txOnuFrames = 0
+	omciCC.rxFrames = 0
+	omciCC.rxOnuFrames = 0
+	omciCC.rxOnuDiscards = 0
+	omciCC.tid = 0x1
+	omciCC.hpTid = 0x8000
+	omciCC.uploadSequNo = 0
+	omciCC.uploadNoOfCmds = 0
+
+	omciCC.txQueue = list.New()
+	omciCC.rxSchedulerMap = make(map[uint16]func(*omci.OMCI, *gp.Packet) error)
+
+	return &omciCC
+}
+
+// Rx handler for omci messages
+func (oo *OmciCC) ReceiveOnuMessage(ctx context.Context, omciMsg *omci.OMCI) error {
+	log.Debugw("rx-onu-autonomous-message", log.Fields{"omciMsgType": omciMsg.MessageType,
+		"payload": hex.EncodeToString(omciMsg.Payload)})
+	/*
+			msgType = rxFrame.fields["message_type"] //assumed OmciOperationsValue
+			rxOnuFrames++
+
+			switch msgType {
+			case AlarmNotification:
+				{
+					log.Info("Unhandled: received-onu-alarm-message")
+					// python code was:
+					//if msg_type == EntityOperations.AlarmNotification.value:
+					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Alarm_Notification)
+					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+					//
+					return errors.New("RxAlarmNotification unimplemented")
+				}
+			case AttributeValueChange:
+				{
+					log.Info("Unhandled: received-attribute-value-change")
+					// python code was:
+					//elif msg_type == EntityOperations.AttributeValueChange.value:
+					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.AVC_Notification)
+					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+					//
+					return errors.New("RxAttributeValueChange unimplemented")
+				}
+			case TestResult:
+				{
+					log.Info("Unhandled: received-test-result")
+					// python code was:
+					//elif msg_type == EntityOperations.TestResult.value:
+					//	topic = OMCI_CC.event_bus_topic(self._device_id, RxEvent.Test_Result)
+					//	self.reactor.callLater(0,  self.event_bus.publish, topic, msg)
+					//
+					return errors.New("RxTestResult unimplemented")
+				}
+			default:
+				{
+					log.Errorw("rx-onu-unsupported-autonomous-message", log.Fields{"msgType": msgType})
+					rxOnuDiscards++
+					return errors.New("RxOnuMsgType unimplemented")
+				}
+		    }
+	*/
+	return errors.New("ReceiveOnuMessage unimplemented")
+}
+
+// Rx handler for onu messages
+//    e.g. would call ReceiveOnuMessage() in case of TID=0 or Action=test ...
+func (oo *OmciCC) ReceiveMessage(ctx context.Context, rxMsg []byte) error {
+	//log.Debugw("cc-receive-omci-message", log.Fields{"RxOmciMessage-x2s": hex.EncodeToString(rxMsg)})
+	if len(rxMsg) >= 44 { // then it should normally include the BaseFormat trailer Len
+		// NOTE: autocorrection only valid for OmciBaseFormat, which is not specifically verified here!!!
+		//  (am extendedFormat message could be destroyed this way!)
+		trailerLenData := rxMsg[42:44]
+		trailerLen := binary.BigEndian.Uint16(trailerLenData)
+		log.Infow("omci-received-trailer-len", log.Fields{"Length": trailerLen})
+		if trailerLen != 40 { // invalid base Format entry -> autocorrect
+			binary.BigEndian.PutUint16(rxMsg[42:44], 40)
+			log.Debug("cc-corrected-omci-message: trailer len inserted")
+		}
+	} else {
+		log.Errorw("received omci-message to small for OmciBaseFormat - abort", log.Fields{"Length": len(rxMsg)})
+		return errors.New("RxOmciMessage to small for BaseFormat")
+	}
+
+	packet := gopacket.NewPacket(rxMsg, omci.LayerTypeOMCI, gopacket.NoCopy)
+	if packet == nil {
+		log.Error("omci-message could not be decoded")
+		return errors.New("could not decode rxMsg as OMCI")
+	}
+	omciLayer := packet.Layer(omci.LayerTypeOMCI)
+	if omciLayer == nil {
+		log.Error("omci-message could not decode omci layer")
+		return errors.New("could not decode omci layer")
+	}
+	omciMsg, ok := omciLayer.(*omci.OMCI)
+	if !ok {
+		log.Error("omci-message could not assign omci layer")
+		return errors.New("could not assign omci layer")
+	}
+	log.Debugw("omci-message-decoded:", log.Fields{"omciMsgType": omciMsg.MessageType,
+		"transCorrId": omciMsg.TransactionID, "DeviceIdent": omciMsg.DeviceIdentifier})
+	if byte(omciMsg.MessageType) & ^me.AK == 0 {
+		// Not a response
+		log.Debug("RxMsg is no Omci Response Message")
+		if omciMsg.TransactionID == 0 {
+			return oo.ReceiveOnuMessage(ctx, omciMsg)
+		} else {
+			log.Errorw("Unexpected TransCorrId != 0  not accepted for autonomous messages",
+				log.Fields{"msgType": omciMsg.MessageType, "payload": hex.EncodeToString(omciMsg.Payload)})
+			return errors.New("Autonomous Omci Message with TranSCorrId != 0 not acccepted")
+		}
+	} else {
+		log.Debug("RxMsg is a Omci Response Message: try to schedule it to the requester")
+		oo.mutexRxSchedMap.Lock()
+		rxCallback, ok := oo.rxSchedulerMap[omciMsg.TransactionID]
+		if ok && rxCallback != nil {
+			//disadvantage of decoupling: error verification made difficult, but anyway the question is
+			// how to react on erroneous frame reception, maybe can simply be ignored
+			go rxCallback(omciMsg, &packet)
+			// having posted the response the request is regarded as 'done'
+			delete(oo.rxSchedulerMap, omciMsg.TransactionID)
+			oo.mutexRxSchedMap.Unlock()
+		} else {
+			oo.mutexRxSchedMap.Unlock()
+			log.Error("omci-message-response for not registered transCorrId")
+			return errors.New("could not find registered response handler tor transCorrId")
+		}
+	}
+
+	return nil
+	/* py code was:
+	           Receive and OMCI message from the proxy channel to the OLT.
+
+	           Call this from your ONU Adapter on a new OMCI Rx on the proxy channel
+	           :param msg: (str) OMCI binary message (used as input to Scapy packet decoder)
+	           """
+	           if not self.enabled:
+	               return
+
+	           try:
+	               now = arrow.utcnow()
+	               d = None
+
+	               # NOTE: Since we may need to do an independent ME map on a per-ONU basis
+	               #       save the current value of the entity_id_to_class_map, then
+	               #       replace it with our custom one before decode, and then finally
+	               #       restore it later. Tried other ways but really made the code messy.
+	               saved_me_map = omci_entities.entity_id_to_class_map
+	               omci_entities.entity_id_to_class_map = self._me_map
+
+	               try:
+	                   rx_frame = msg if isinstance(msg, OmciFrame) else OmciFrame(msg)
+	                   self.log.debug('recv-omci-msg', omci_msg=hexlify(msg))
+	               except KeyError as e:
+	                   # Unknown, Unsupported, or vendor-specific ME. Key is the unknown classID
+	                   self.log.debug('frame-decode-key-error', omci_msg=hexlify(msg), e=e)
+	                   rx_frame = self._decode_unknown_me(msg)
+	                   self._rx_unknown_me += 1
+
+	               except Exception as e:
+	                   self.log.exception('frame-decode', omci_msg=hexlify(msg), e=e)
+	                   return
+
+	               finally:
+	                   omci_entities.entity_id_to_class_map = saved_me_map     # Always restore it.
+
+	               rx_tid = rx_frame.fields['transaction_id']
+	               msg_type = rx_frame.fields['message_type']
+	               self.log.debug('Received message for rx_tid', rx_tid = rx_tid, msg_type = msg_type)
+	               # Filter the Test Result frame and route through receive onu
+	               # message method.
+	               if rx_tid == 0 or msg_type == EntityOperations.TestResult.value:
+	                   self.log.debug('Receive ONU message', rx_tid=0)
+	                   return self._receive_onu_message(rx_frame)
+
+	               # Previously unreachable if this is the very first round-trip Rx or we
+	               # have been running consecutive errors
+	               if self._rx_frames == 0 or self._consecutive_errors != 0:
+	                   self.log.debug('Consecutive errors for rx', err = self._consecutive_errors)
+	                   self.reactor.callLater(0, self._publish_connectivity_event, True)
+
+	               self._rx_frames += 1
+	               self._consecutive_errors = 0
+
+	               try:
+	                   high_priority = self._tid_is_high_priority(rx_tid)
+	                   index = self._get_priority_index(high_priority)
+
+	                   # (timestamp, defer, frame, timeout, retry, delayedCall)
+	                   last_tx_tuple = self._tx_request[index]
+
+	                   if last_tx_tuple is None or \
+	                           last_tx_tuple[OMCI_CC.REQUEST_FRAME].fields.get('transaction_id') != rx_tid:
+	                       # Possible late Rx on a message that timed-out
+	                       if last_tx_tuple:
+	                           self.log.debug('Unknown message', rx_tid=rx_tid,
+	                                          tx_id=last_tx_tuple[OMCI_CC.REQUEST_FRAME].fields.get('transaction_id'))
+	                       self._rx_unknown_tid += 1
+	                       self._rx_late += 1
+	                       return
+
+	                   ts, d, tx_frame, timeout, retry, dc = last_tx_tuple
+	                   if dc is not None and not dc.cancelled and not dc.called:
+	                       dc.cancel()
+
+	                   _secs = self._update_rx_tx_stats(now, ts)
+
+	                   # Late arrival already serviced by a timeout?
+	                   if d.called:
+	                       self._rx_late += 1
+	                       self.log.debug('Serviced by timeout. Late arrival', rx_late = self._rx_late)
+	                       return
+
+	               except Exception as e:
+	                   self.log.exception('frame-match', msg=hexlify(msg), e=e)
+	                   if d is not None:
+	                       return d.errback(failure.Failure(e))
+	                   return
+
+	               # Publish Rx event to listeners in a different task
+	               self.log.debug('Publish rx event', rx_tid = rx_tid,
+	                              tx_tid = tx_frame.fields['transaction_id'])
+	               reactor.callLater(0, self._publish_rx_frame, tx_frame, rx_frame)
+
+	               # begin success callback chain (will cancel timeout and queue next Tx message)
+	               self._rx_response[index] = rx_frame
+	               d.callback(rx_frame)
+
+	           except Exception as e:
+	   			self.log.exception('rx-msg', e=e)
+	*/
+}
+
+func (oo *OmciCC) PublishRxResponseFrame(ctx context.Context, txFrame []byte, rxFrame []byte) error {
+	return errors.New("PublishRxResponseFrame unimplemented")
+	/*
+		def _publish_rx_frame(self, tx_frame, rx_frame):
+	*/
+}
+
+//Queue the OMCI Frame for a transmit to the ONU via the proxy_channel
+func (oo *OmciCC) Send(ctx context.Context, txFrame []byte, timeout int, retry int, highPrio bool,
+	receiveCallbackPair CallbackPair) error {
+
+	log.Debugw("register-response-callback:", log.Fields{"for TansCorrId": receiveCallbackPair.cbKey})
+	// it could be checked, if the callback keay is already registered - but simply overwrite may be acceptable ...
+	oo.mutexRxSchedMap.Lock()
+	oo.rxSchedulerMap[receiveCallbackPair.cbKey] = receiveCallbackPair.cbFunction
+	oo.mutexRxSchedMap.Unlock()
+
+	//just use a simple list for starting - might need some more effort, especially for multi source write access
+	omciTxRequest := omciTransferStructure{
+		txFrame,
+		timeout,
+		retry,
+		highPrio,
+	}
+	oo.mutexTxQueue.Lock()
+	oo.txQueue.PushBack(omciTxRequest) // enqueue
+	oo.mutexTxQueue.Unlock()
+
+	// for first test just bypass and send directly:
+	go oo.sendNextRequest(ctx)
+	return nil
+}
+
+//Pull next tx request and send it
+func (oo *OmciCC) sendNextRequest(ctx context.Context) error {
+	//	return errors.New("sendNextRequest unimplemented")
+
+	// just try to get something transferred !!
+	// avoid accessing the txQueue from parallel send requests
+	// block parallel omci send requests at least until SendIAP is 'committed'
+	// that should be feasible for an onu instance as on OMCI anyway window size 1 is assumed
+	oo.mutexTxQueue.Lock()
+	for oo.txQueue.Len() > 0 {
+		queueElement := oo.txQueue.Front() // First element
+		omciTxRequest := queueElement.Value.(omciTransferStructure)
+		/* compare olt device handler code:
+		func (dh *DeviceHandler) omciIndication(omciInd *oop.OmciIndication) {
+			log.Debugw("omci indication", log.Fields{"intfID": omciInd.IntfId, "onuID": omciInd.OnuId})
+			var deviceType string
+			var deviceID string
+			var proxyDeviceID string
+
+			onuKey := dh.formOnuKey(omciInd.IntfId, omciInd.OnuId)
+
+			if onuInCache, ok := dh.onus.Load(onuKey); !ok {
+
+				log.Debugw("omci indication for a device not in cache.", log.Fields{"intfID": omciInd.IntfId, "onuID": omciInd.OnuId})
+				ponPort := IntfIDToPortNo(omciInd.GetIntfId(), voltha.Port_PON_OLT)
+				kwargs := make(map[string]interface{})
+				kwargs["onu_id"] = omciInd.OnuId
+				kwargs["parent_port_no"] = ponPort
+
+				onuDevice, err := dh.coreProxy.GetChildDevice(context.TODO(), dh.device.Id, kwargs)
+				if err != nil {
+					log.Errorw("onu not found", log.Fields{"intfID": omciInd.IntfId, "onuID": omciInd.OnuId, "error": err})
+					return
+				}
+				deviceType = onuDevice.Type
+				deviceID = onuDevice.Id
+				proxyDeviceID = onuDevice.ProxyAddress.DeviceId
+				//if not exist in cache, then add to cache.
+				dh.onus.Store(onuKey, NewOnuDevice(deviceID, deviceType, onuDevice.SerialNumber, omciInd.OnuId, omciInd.IntfId, proxyDeviceID))
+			} else {
+				//found in cache
+				log.Debugw("omci indication for a device in cache.", log.Fields{"intfID": omciInd.IntfId, "onuID": omciInd.OnuId})
+				deviceType = onuInCache.(*OnuDevice).deviceType
+				deviceID = onuInCache.(*OnuDevice).deviceID
+				proxyDeviceID = onuInCache.(*OnuDevice).proxyDeviceID
+			}
+		*/
+		/* and compare onu_adapter py code:
+		omci_msg = InterAdapterOmciMessage(
+			message=bytes(frame),
+			proxy_address=self._proxy_address,
+			connect_status=self._device.connect_status)
+
+		self.log.debug('sent-omci-msg', tid=tx_tid, omci_msg=hexlify(bytes(frame)))
+
+		yield self._adapter_proxy.send_inter_adapter_message(
+			msg=omci_msg,
+			type=InterAdapterMessageType.OMCI_REQUEST,
+			from_adapter=self._device.type,
+			to_adapter=self._proxy_address.device_type,
+			to_device_id=self._device_id,
+			proxy_device_id=self._proxy_address.device_id
+		)
+		*/
+		device, err := oo.coreProxy.GetDevice(ctx,
+			oo.pBaseDeviceHandler.deviceID, oo.deviceID) //parent, child
+		if err != nil || device == nil {
+			/*TODO: needs to handle error scenarios */
+			log.Errorw("Failed to fetch device", log.Fields{"err": err, "ParentId": oo.pBaseDeviceHandler.deviceID,
+				"ChildId": oo.deviceID})
+			return errors.New("failed to fetch device")
+		}
+
+		log.Debugw("omci-message-sending", log.Fields{"fromDeviceType": oo.pBaseDeviceHandler.DeviceType,
+			"toDeviceType": oo.pBaseDeviceHandler.ProxyAddressType,
+			"onuDeviceID":  oo.deviceID, "proxyDeviceID": oo.pBaseDeviceHandler.ProxyAddressID})
+		log.Debugw("omci-message-to-send:",
+			log.Fields{"TxOmciMessage": hex.EncodeToString(omciTxRequest.txFrame)})
+
+		omciMsg := &ic.InterAdapterOmciMessage{Message: omciTxRequest.txFrame}
+		if sendErr := oo.adapterProxy.SendInterAdapterMessage(context.Background(), omciMsg,
+			ic.InterAdapterMessageType_OMCI_REQUEST,
+			//fromType,toType,toDevId, ProxyDevId
+			oo.pBaseDeviceHandler.DeviceType, oo.pBaseDeviceHandler.ProxyAddressType,
+			oo.deviceID, oo.pBaseDeviceHandler.ProxyAddressID, ""); sendErr != nil {
+			log.Errorw("send omci request error", log.Fields{"error": sendErr})
+			return sendErr
+		}
+		oo.txQueue.Remove(queueElement) // Dequeue
+	}
+	oo.mutexTxQueue.Unlock()
+	return nil
+}
+
+func (oo *OmciCC) GetNextTid(highPriority bool) uint16 {
+	var next uint16
+	if highPriority {
+		oo.mutexTid.Lock()
+		next = oo.hpTid
+		oo.hpTid += 1
+		if oo.hpTid < 0x8000 {
+			oo.hpTid = 0x8000
+		}
+		oo.mutexTid.Unlock()
+	} else {
+		oo.mutexHpTid.Lock()
+		next = oo.tid
+		oo.tid += 1
+		if oo.tid >= 0x8000 {
+			oo.tid = 1
+		}
+		oo.mutexHpTid.Unlock()
+	}
+	return next
+}
+
+// ###################################################################################
+// # utility methods provided to work on OMCI messages
+func serialize(msgType omci.MessageType, request gopacket.SerializableLayer, tid uint16) ([]byte, error) {
+	omciLayer := &omci.OMCI{
+		TransactionID: tid,
+		MessageType:   msgType,
+	}
+	var options gopacket.SerializeOptions
+	options.FixLengths = true
+
+	buffer := gopacket.NewSerializeBuffer()
+	err := gopacket.SerializeLayers(buffer, options, omciLayer, request)
+	if err != nil {
+		return nil, err
+	}
+	return buffer.Bytes(), nil
+}
+
+func hexEncode(omciPkt []byte) ([]byte, error) {
+	dst := make([]byte, hex.EncodedLen(len(omciPkt)))
+	hex.Encode(dst, omciPkt)
+	return dst, nil
+}
+
+// ###################################################################################
+// # MIB Action shortcuts  - still dummies - TODO!!!!!
+
+//supply a response handler for the MibSync omci response messages
+func (oo *OmciCC) receiveMibSyncResponse(omciMsg *omci.OMCI, packet *gp.Packet) error {
+
+	log.Debugw("mib-sync-omci-message-response received:", log.Fields{"omciMsgType": omciMsg.MessageType,
+		"transCorrId": omciMsg.TransactionID, "deviceId": oo.deviceID})
+
+	if oo.pOnuDeviceEntry == nil {
+		log.Error("Abort Receive MibSync OMCI, DeviceEntryPointer is nil")
+		return errors.New("DeviceEntryPointer is nil")
+	}
+
+	// no further test on SeqNo is done here, assignment from rxScheduler is trusted
+	// MibSync responses are simply transferred via deviceEntry to MibSync, no specific analysis here
+	mibSyncMsg := Message{
+		Type: OMCI,
+		Data: OmciMessage{
+			OmciMsg:    omciMsg,
+			OmciPacket: packet,
+		},
+	}
+	//log.Debugw("Message to be sent into channel:", log.Fields{"mibSyncMsg": mibSyncMsg})
+	(*oo.pOnuDeviceEntry).MibSyncChan <- mibSyncMsg
+
+	return nil
+}
+
+func (oo *OmciCC) sendMibReset(ctx context.Context, timeout int, highPrio bool) error {
+
+	log.Debugw("send MibReset-msg to:", log.Fields{"deviceId": oo.deviceID})
+	request := &omci.MibResetRequest{
+		MeBasePacket: omci.MeBasePacket{
+			EntityClass: me.OnuDataClassID,
+		},
+	}
+	tid := oo.GetNextTid(highPrio)
+	pkt, err := serialize(omci.MibResetRequestType, request, tid)
+	if err != nil {
+		log.Errorw("Cannot serialize MibResetRequest", log.Fields{"Err": err})
+		return err
+	}
+	omciRxCallbackPair := CallbackPair{tid, oo.receiveMibSyncResponse}
+	return oo.Send(ctx, pkt, timeout, 0, highPrio, omciRxCallbackPair)
+}
+
+func (oo *OmciCC) sendMibUpload(ctx context.Context, timeout int, highPrio bool) error {
+
+	log.Debugw("send MibUpload-msg to:", log.Fields{"deviceId": oo.deviceID})
+	request := &omci.MibUploadRequest{
+		MeBasePacket: omci.MeBasePacket{
+			EntityClass: me.OnuDataClassID,
+		},
+	}
+	tid := oo.GetNextTid(highPrio)
+	pkt, err := serialize(omci.MibUploadRequestType, request, tid)
+	if err != nil {
+		log.Errorw("Cannot serialize MibUploadRequest", log.Fields{"Err": err})
+		return err
+	}
+	oo.uploadSequNo = 0
+	oo.uploadNoOfCmds = 0
+
+	omciRxCallbackPair := CallbackPair{tid, oo.receiveMibSyncResponse}
+	return oo.Send(ctx, pkt, timeout, 0, highPrio, omciRxCallbackPair)
+}
+
+func (oo *OmciCC) sendMibUploadNext(ctx context.Context, timeout int, highPrio bool) error {
+
+	log.Debugw("send MibUploadNext-msg to:", log.Fields{"deviceId": oo.deviceID, "uploadSequNo": oo.uploadSequNo})
+	request := &omci.MibUploadNextRequest{
+		MeBasePacket: omci.MeBasePacket{
+			EntityClass: me.OnuDataClassID,
+		},
+		CommandSequenceNumber: oo.uploadSequNo,
+	}
+	tid := oo.GetNextTid(highPrio)
+	pkt, err := serialize(omci.MibUploadNextRequestType, request, tid)
+	if err != nil {
+		log.Errorw("Cannot serialize MibUploadNextRequest", log.Fields{"Err": err})
+		return err
+	}
+	oo.uploadSequNo++
+
+	omciRxCallbackPair := CallbackPair{tid, oo.receiveMibSyncResponse}
+	return oo.Send(ctx, pkt, timeout, 0, highPrio, omciRxCallbackPair)
+}
+
+/* py code example
+...
+def send_mib_upload(self, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+	frame = OntDataFrame().mib_upload()
+	return self.send(frame, timeout=timeout, high_priority=high_priority)
+
+def send_mib_upload_next(self, seq_no, timeout=DEFAULT_OMCI_TIMEOUT, high_priority=False):
+	frame = OntDataFrame(sequence_number=seq_no).mib_upload_next()
+	return self.send(frame, timeout=timeout, high_priority=high_priority)
+...
+*/