diff --git a/internal/common/omci/image_test.go b/internal/common/omci/image_test.go
new file mode 100644
index 0000000..ad07eac
--- /dev/null
+++ b/internal/common/omci/image_test.go
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2018-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 omci
+
+import (
+	"github.com/google/gopacket"
+	"github.com/opencord/omci-lib-go"
+	me "github.com/opencord/omci-lib-go/generated"
+	"gotest.tools/assert"
+	"testing"
+)
+
+func omciToStartSoftwareDownloadResponse(t *testing.T, omciPkt *gopacket.Packet) *omci.StartSoftwareDownloadResponse {
+	msgLayer := (*omciPkt).Layer(omci.LayerTypeStartSoftwareDownloadResponse)
+	if msgLayer == nil {
+		t.Fatal("omci Msg layer could not be detected for StartSoftwareDownloadResponse")
+	}
+	msgObj, msgOk := msgLayer.(*omci.StartSoftwareDownloadResponse)
+	if !msgOk {
+		t.Fatal("omci Msg layer could not be assigned for StartSoftwareDownloadResponse")
+	}
+	return msgObj
+}
+
+func TestCreateStartSoftwareDownloadResponse(t *testing.T) {
+	omciReq := &omci.StartSoftwareDownloadRequest{
+		MeBasePacket: omci.MeBasePacket{
+			EntityClass:    me.SoftwareImageClassID,
+			EntityInstance: 1,
+		},
+		ImageSize:            32768,
+		NumberOfCircuitPacks: 1,
+		WindowSize:           31,
+		CircuitPacks:         []uint16{0},
+	}
+
+	omciReqPkt, err := Serialize(omci.StartSoftwareDownloadRequestType, omciReq, 66)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	omciReqPkt, _ = HexEncode(omciReqPkt)
+
+	// start test
+	pkt, msg, _ := ParseOpenOltOmciPacket(omciReqPkt)
+	responsePkt, err := CreateStartSoftwareDownloadResponse(pkt, msg)
+	assert.NilError(t, err)
+
+	omciResponseMsg, omciResponsePkt := omciBytesToMsg(t, responsePkt)
+	assert.Equal(t, omciResponseMsg.MessageType, omci.StartSoftwareDownloadResponseType)
+
+	getResponseLayer := omciToStartSoftwareDownloadResponse(t, omciResponsePkt)
+
+	assert.Equal(t, getResponseLayer.Result, me.Success)
+}
+
+func TestComputeDownloadSectionsCount(t *testing.T) {
+	omciReq := &omci.StartSoftwareDownloadRequest{
+		MeBasePacket: omci.MeBasePacket{
+			EntityClass:    me.SoftwareImageClassID,
+			EntityInstance: 1,
+		},
+		ImageSize:            32768,
+		NumberOfCircuitPacks: 1,
+		WindowSize:           31,
+		CircuitPacks:         []uint16{0},
+	}
+
+	omciReqPkt, err := Serialize(omci.StartSoftwareDownloadRequestType, omciReq, 66)
+	if err != nil {
+		t.Fatal(err.Error())
+	}
+
+	omciReqPkt, _ = HexEncode(omciReqPkt)
+	pkt, _, _ := ParseOpenOltOmciPacket(omciReqPkt)
+
+	count := ComputeDownloadSectionsCount(pkt)
+	assert.Equal(t, count, 1058)
+}