diff --git a/release/models/optical-transport/openconfig-transport-types.yang b/release/models/optical-transport/openconfig-transport-types.yang
index 34e2f8a655..328c4d507a 100644
--- a/release/models/optical-transport/openconfig-transport-types.yang
+++ b/release/models/optical-transport/openconfig-transport-types.yang
@@ -22,8 +22,14 @@ module openconfig-transport-types {
     "This module contains general type definitions and identities
     for optical transport models.";
 
-  oc-ext:openconfig-version "1.1.0";
+  oc-ext:openconfig-version "1.2.0";
 
+  revision "2025-07-11" {
+    description
+      "Add 100G lambda MSA PMD types: 100G-LR, 4X100G-LR, 100G-FR,
+      4X100G-FR";
+    reference "1.2.0";
+  }
   revision "2024-11-21" {
     description
       "Add PROT_OTSI_A protocol type.";
@@ -1211,6 +1217,31 @@ module openconfig-transport-types {
     description "Ethernet compliance code: 100GBASE_LR4";
   }
 
+  identity ETH_2X100GBASE_LR4 {
+    base ETHERNET_PMD_TYPE;
+    description "Ethernet compliance code: 2x100GBASE_LR4";
+  }
+
+  identity ETH_100GBASE_LR {
+    base ETHERNET_PMD_TYPE;
+    description "Ethernet compliance code: 100GBASE_LR";
+  }
+
+  identity ETH_4X100GBASE_LR {
+    base ETHERNET_PMD_TYPE;
+    description "Ethernet compliance code: 4x100GBASE_LR";
+  }
+
+  identity ETH_100GBASE_FR {
+    base ETHERNET_PMD_TYPE;
+    description "Ethernet compliance code: 100GBASE_FR";
+  }
+
+  identity ETH_4X100GBASE_FR {
+    base ETHERNET_PMD_TYPE;
+    description "Ethernet compliance code: 4x100GBASE_FR";
+  }
+
   identity ETH_100GBASE_ER4L {
     base ETHERNET_PMD_TYPE;
     description "Ethernet compliance code: 100GBASE_ER4L";