diff --git a/drivers/optical/src/main/java/org/onosproject/driver/optical/handshaker/CalientFiberSwitchHandshaker.java b/drivers/optical/src/main/java/org/onosproject/driver/optical/handshaker/CalientFiberSwitchHandshaker.java
new file mode 100644
index 0000000..338d25c
--- /dev/null
+++ b/drivers/optical/src/main/java/org/onosproject/driver/optical/handshaker/CalientFiberSwitchHandshaker.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * 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 org.onosproject.driver.optical.handshaker;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.net.Device;
+import org.onosproject.openflow.controller.OpenFlowOpticalSwitch;
+import org.onosproject.openflow.controller.PortDescPropertyType;
+import org.onosproject.openflow.controller.driver.AbstractOpenFlowSwitch;
+import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeAlreadyStarted;
+import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeCompleted;
+import org.onosproject.openflow.controller.driver.SwitchDriverSubHandshakeNotStarted;
+import org.projectfloodlight.openflow.protocol.OFCalientFlowStatsRequest;
+import org.projectfloodlight.openflow.protocol.OFCalientPortDescStatsEntry;
+import org.projectfloodlight.openflow.protocol.OFCalientPortDescStatsReply;
+import org.projectfloodlight.openflow.protocol.OFCalientPortDescStatsRequest;
+import org.projectfloodlight.openflow.protocol.OFFlowStatsRequest;
+import org.projectfloodlight.openflow.protocol.OFMessage;
+import org.projectfloodlight.openflow.protocol.OFObject;
+import org.projectfloodlight.openflow.protocol.OFStatsReplyFlags;
+import org.projectfloodlight.openflow.protocol.OFStatsRequest;
+import org.projectfloodlight.openflow.protocol.OFType;
+import org.projectfloodlight.openflow.types.OFPort;
+import org.projectfloodlight.openflow.types.TableId;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Driver for Calient S160 Optical Circuit Switch. Untested on Calient S320 but probably works ok.
+ *
+ * Driver implements custom handshaker, and rewrites flow stats as expected by the device. Port stats are currently
+ * not supported.
+ *
+ * The device consists of OMS ports only.
+ */
+public class CalientFiberSwitchHandshaker extends AbstractOpenFlowSwitch implements OpenFlowOpticalSwitch {
+
+    private final AtomicBoolean driverHandshakeComplete = new AtomicBoolean(false);
+    private List<OFCalientPortDescStatsEntry> fiberPorts = new ArrayList<>();
+
+
+    @Override
+    public Boolean supportNxRole() {
+        return false;
+    }
+
+    @Override
+    public void startDriverHandshake() {
+        log.warn("Starting driver handshake for sw {}", getStringId());
+        if (startDriverHandshakeCalled) {
+            throw new SwitchDriverSubHandshakeAlreadyStarted();
+        }
+        startDriverHandshakeCalled = true;
+        try {
+            sendHandshakeOFExperimenterPortDescRequest();
+        } catch (IOException e) {
+            log.error("Exception while sending experimenter port desc:", e);
+        }
+
+    }
+
+    private void sendHandshakeOFExperimenterPortDescRequest() throws IOException {
+        // send multi part message for port description for optical switches
+        OFCalientPortDescStatsRequest portsRequest = factory()
+                .buildCalientPortDescStatsRequest()
+                .build();
+        log.warn("Sending experimenter port description message {}",
+                portsRequest.toString());
+        this.sendHandshakeMessage(portsRequest);
+    }
+
+    @Override
+    public boolean isDriverHandshakeComplete() {
+        return driverHandshakeComplete.get();
+    }
+
+    @Override
+    public void processDriverHandshakeMessage(OFMessage m) {
+        if (!startDriverHandshakeCalled) {
+            throw new SwitchDriverSubHandshakeNotStarted();
+        }
+        if (driverHandshakeComplete.get()) {
+            throw new SwitchDriverSubHandshakeCompleted(m);
+        }
+
+        switch (m.getType()) {
+            case BARRIER_REPLY:
+                break;
+            case ERROR:
+                log.error("Switch Error {} {}", getStringId(), m);
+                break;
+            case FEATURES_REPLY:
+                break;
+            case FLOW_REMOVED:
+                break;
+            case GET_ASYNC_REPLY:
+                break;
+            case PACKET_IN:
+                break;
+            case PORT_STATUS:
+                break;
+            case QUEUE_GET_CONFIG_REPLY:
+                break;
+            case ROLE_REPLY:
+                break;
+            case STATS_REPLY:
+                log.warn("Received port desc reply");
+                OFCalientPortDescStatsReply descStatsReply = (OFCalientPortDescStatsReply) m;
+                fiberPorts.addAll(descStatsReply.getPortDesc());
+                // Multi-part message
+                if (!descStatsReply.getFlags().contains(OFStatsReplyFlags.REPLY_MORE)) {
+                    driverHandshakeComplete.set(true);
+                }
+                break;
+            default:
+                log.warn("Received message {} during switch-driver " +
+                                "subhandshake " + "from switch {} ... " +
+                                "Ignoring message", m,
+                        getStringId());
+
+        }
+    }
+
+    @Override
+    public Device.Type deviceType() {
+        return Device.Type.FIBER_SWITCH;
+    }
+
+    @Override
+    public List<? extends OFObject> getPortsOf(PortDescPropertyType type) {
+        return ImmutableList.copyOf(fiberPorts);
+    }
+
+    @Override
+    public Set<PortDescPropertyType> getPortTypes() {
+        return ImmutableSet.of(PortDescPropertyType.OPTICAL_TRANSPORT);
+    }
+
+    @Override
+    public final void sendMsg(OFMessage m) {
+        OFMessage newMsg = m;
+
+        if (m.getType() == OFType.STATS_REQUEST) {
+            OFStatsRequest sr = (OFStatsRequest) m;
+            log.debug("Rebuilding stats request type {}", sr.getStatsType());
+            switch (sr.getStatsType()) {
+                case FLOW:
+                    OFCalientFlowStatsRequest request = this.factory().buildCalientFlowStatsRequest()
+                            .setCookie(((OFFlowStatsRequest) sr).getCookie())
+                            .setCookieMask(((OFFlowStatsRequest) sr).getCookieMask())
+                            .setMatch(this.factory().matchWildcardAll())
+                            .setOutGroup(((OFFlowStatsRequest) sr).getOutGroup().getGroupNumber())
+                            .setOutPort(OFPort.ANY)
+                            .setTableId(TableId.ALL)
+                            .setXid(sr.getXid())
+                            .setFlags(sr.getFlags())
+                            .build();
+                    newMsg = request;
+                    break;
+                case PORT:
+                    // TODO
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        super.sendMsg(newMsg);
+    }
+}