diff --git a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
index 3b7b975..0fa46f0 100644
--- a/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
+++ b/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/OpenFlowDeviceProvider.java
@@ -124,7 +124,6 @@
     private static final long KBPS = 1_000;
     private static final long MBPS = 1_000 * 1_000;
     private static final Frequency FREQ100 = Frequency.ofGHz(100);
-    private static final Frequency FREQ193_1 = Frequency.ofTHz(193.1);
     private static final Frequency FREQ4_4 = Frequency.ofTHz(4.4);
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -596,8 +595,8 @@
             DefaultPortDescription portDes = null;
             switch (sigType) {
             case OMSN:
-                portDes =  new OmsPortDescription(portNo, enabled, FREQ193_1, FREQ193_1.add(FREQ4_4),
-                       FREQ100, annotations);
+                portDes =  new OmsPortDescription(portNo, enabled,
+                        Spectrum.CENTER_FREQUENCY, Spectrum.CENTER_FREQUENCY.add(FREQ4_4), FREQ100, annotations);
                 break;
             case OCH:
                 OFExpPortOpticalTransportLayerEntry entry = firstProp.getFeatures().get(0).getValue().get(0);
diff --git a/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java b/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
index 06c73d3..496f97d 100644
--- a/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
+++ b/web/api/src/main/java/org/onosproject/rest/resources/ConfigProvider.java
@@ -25,6 +25,7 @@
 import org.onlab.packet.MacAddress;
 import org.onlab.packet.VlanId;
 import org.onlab.util.Frequency;
+import org.onlab.util.Spectrum;
 import org.onosproject.net.AnnotationKeys;
 import org.onosproject.net.ChannelSpacing;
 import org.onosproject.net.ConnectPoint;
@@ -100,7 +101,6 @@
 
     private static final String UNKNOWN = "unknown";
 
-    private static final Frequency CENTER = Frequency.ofTHz(193.1);
     // C-band has 4.4 THz (4,400 GHz) total bandwidth
     private static final Frequency TOTAL = Frequency.ofTHz(4.4);
 
@@ -256,7 +256,7 @@
                 // Currently, assume OMS when FIBER. Provide sane defaults.
                 annotations = annotations(node.get("annotations"));
                 return new OmsPortDescription(port, node.path("enabled").asBoolean(true),
-                                              CENTER, CENTER.add(TOTAL),
+                        Spectrum.CENTER_FREQUENCY, Spectrum.CENTER_FREQUENCY.add(TOTAL),
                                               Frequency.ofGHz(100), annotations);
             case ODUCLT:
                 annotations = annotations(node.get("annotations"));
@@ -391,8 +391,8 @@
         // if true, there was less channels than can be tightly packed.
         Frequency grid = chl.frequency();
         // say Linc's 1st slot starts at CENTER and goes up from there.
-        Frequency min = CENTER.add(grid);
-        Frequency max = CENTER.add(grid.multiply(numChls));
+        Frequency min = Spectrum.CENTER_FREQUENCY.add(grid);
+        Frequency max = Spectrum.CENTER_FREQUENCY.add(grid.multiply(numChls));
 
         PortDescription srcPortDesc = new OmsPortDescription(srcCp.port(), true, min, max, grid);
         PortDescription dstPortDesc = new OmsPortDescription(dstCp.port(), true, min, max, grid);