diff --git a/core/api/src/main/java/org/onosproject/net/OchPort.java b/core/api/src/main/java/org/onosproject/net/OchPort.java
new file mode 100644
index 0000000..cdf0dd3
--- /dev/null
+++ b/core/api/src/main/java/org/onosproject/net/OchPort.java
@@ -0,0 +1,218 @@
+/*
+ * Copyright 2015 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.net;
+
+import org.onlab.util.Frequency;
+
+import java.util.Objects;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+/**
+ * Implementation of OCh port (Optical Channel).
+ * Also referred to as a line side port (L-port) or narrow band port.
+ * See ITU G.709 "Interfaces for the Optical Transport Network (OTN)"
+ */
+public class OchPort extends DefaultPort {
+
+    public static final Frequency CENTER_FREQUENCY = Frequency.ofTHz(193.1);
+    public static final Frequency FLEX_GRID_SLOT = Frequency.ofGHz(12.5);
+
+    public enum SignalType {
+        ODU0,
+        ODU1,
+        ODU2,
+        ODU2e,
+        ODU3,
+        ODU4
+    }
+
+    public enum GridType {
+        RES,                // ??
+        DWDM,               // Dense Wavelength Division Multiplexing
+        CWDM,               // Coarse WDM
+        FLEX                // Flex Grid
+    }
+
+    public enum ChannelSpacing {
+        CHL_100GHZ(100),        // 100 GHz
+        CHL_50GHZ(50),          // 50 GHz
+        CHL_25GHZ(25),          // 25 GHz
+        CHL_12P5GHZ(12.5),      // 12.5 GHz
+        CHL_6P25GHZ(6.5);       // 6.25 GHz
+
+        private final Frequency frequency;
+
+        ChannelSpacing(double value) {
+            this.frequency = Frequency.ofGHz(value);
+        }
+
+        public Frequency frequency() {
+            return frequency;
+        }
+    }
+
+    private final SignalType signalType;
+    private final boolean isTunable;
+    private final GridType gridType;
+    private final ChannelSpacing channelSpacing;
+    // Frequency = 193.1 THz + spacingMultiplier * channelSpacing
+    private final int spacingMultiplier;
+    // Slot width = slotGranularity * 12.5 GHz
+    private final int slotGranularity;
+
+
+    /**
+     * Creates an OCh port in the specified network element.
+     *
+     * @param element               parent network element
+     * @param number                port number
+     * @param isEnabled             port enabled state
+     * @param signalType            ODU signal type
+     * @param isTunable             maximum frequency in MHz
+     * @param gridType              grid type
+     * @param channelSpacing        channel spacing
+     * @param spacingMultiplier     channel spacing multiplier
+     * @param slotGranularity       slot width granularity
+     * @param annotations           optional key/value annotations
+     */
+    public OchPort(Element element, PortNumber number, boolean isEnabled, SignalType signalType,
+                   boolean isTunable, GridType gridType, ChannelSpacing channelSpacing,
+                   int spacingMultiplier, int slotGranularity, Annotations... annotations) {
+        super(element, number, isEnabled, Type.OCH, 0, annotations);
+        this.signalType = signalType;
+        this.isTunable = isTunable;
+        this.gridType = gridType;
+        this.channelSpacing = channelSpacing;
+        this.spacingMultiplier = spacingMultiplier;
+        this.slotGranularity = slotGranularity;
+    }
+
+    /**
+     * Returns ODU signal type.
+     *
+     * @return ODU signal type
+     */
+    public SignalType signalType() {
+        return signalType;
+    }
+
+    /**
+     * Returns true if port is wavelength tunable.
+     *
+     * @return tunable wavelength capability
+     */
+    public boolean isTunable() {
+        return isTunable;
+    }
+
+    /**
+     * Returns grid type.
+     *
+     * @return grid type
+     */
+    public GridType gridType() {
+        return gridType;
+    }
+
+    /**
+     * Returns channel spacing.
+     *
+     * @return channel spacing
+     */
+    public ChannelSpacing channelSpacing() {
+        return channelSpacing;
+    }
+
+    /**
+     * Returns spacing multiplier.
+     *
+     * @return spacing multiplier
+     */
+    public int spacingMultiplier() {
+        return spacingMultiplier;
+    }
+
+    /**
+     * Returns slow width granularity.
+     *
+     * @return slow width granularity
+     */
+    public int slotGranularity() {
+        return slotGranularity;
+    }
+
+    /**
+     * Returns central frequency in MHz.
+     *
+     * @return frequency in MHz
+     */
+    public Frequency centralFrequency() {
+        return CENTER_FREQUENCY.add(channelSpacing().frequency().multiply(spacingMultiplier));
+    }
+
+    /**
+     * Returns slot width.
+     *
+     * @return slot width
+     */
+    public Frequency slotWidth() {
+        return FLEX_GRID_SLOT.multiply(slotGranularity);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(number(), isEnabled(), type(), signalType, isTunable,
+                gridType, channelSpacing, spacingMultiplier, slotGranularity, annotations());
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof OchPort) {
+            final OchPort other = (OchPort) obj;
+            return Objects.equals(this.element().id(), other.element().id()) &&
+                    Objects.equals(this.number(), other.number()) &&
+                    Objects.equals(this.isEnabled(), other.isEnabled()) &&
+                    Objects.equals(this.signalType, other.signalType) &&
+                    Objects.equals(this.isTunable, other.isTunable) &&
+                    Objects.equals(this.gridType, other.gridType) &&
+                    Objects.equals(this.channelSpacing, other.channelSpacing) &&
+                    Objects.equals(this.spacingMultiplier, other.spacingMultiplier) &&
+                    Objects.equals(this.slotGranularity, other.slotGranularity) &&
+                    Objects.equals(this.annotations(), other.annotations());
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this)
+                .add("element", element().id())
+                .add("number", number())
+                .add("isEnabled", isEnabled())
+                .add("type", type())
+                .add("signalType", signalType)
+                .add("isTunable", isTunable)
+                .add("gridType", gridType)
+                .add("channelSpacing", channelSpacing)
+                .add("spacingMultiplier", spacingMultiplier)
+                .add("slotGranularity", slotGranularity)
+                .toString();
+    }
+}