diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationAsyncClient.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationAsyncClient.java
index 463fff7b41a92..7364c21e4f767 100644
--- a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationAsyncClient.java
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationAsyncClient.java
@@ -11,6 +11,7 @@
 import com.azure.communication.callautomation.implementation.accesshelpers.CallConnectionPropertiesConstructorProxy;
 import com.azure.communication.callautomation.implementation.converters.CommunicationIdentifierConverter;
 import com.azure.communication.callautomation.implementation.converters.CommunicationUserIdentifierConverter;
+import com.azure.communication.callautomation.implementation.converters.MicrosoftTeamsAppIdentifierConverter;
 import com.azure.communication.callautomation.implementation.converters.PhoneNumberIdentifierConverter;
 import com.azure.communication.callautomation.implementation.models.AnswerCallRequestInternal;
 import com.azure.communication.callautomation.implementation.models.CallIntelligenceOptionsInternal;
@@ -23,6 +24,7 @@
 import com.azure.communication.callautomation.implementation.models.MediaStreamingConfigurationInternal;
 import com.azure.communication.callautomation.implementation.models.MediaStreamingContentTypeInternal;
 import com.azure.communication.callautomation.implementation.models.MediaStreamingTransportTypeInternal;
+import com.azure.communication.callautomation.implementation.models.MicrosoftTeamsAppIdentifierModel;
 import com.azure.communication.callautomation.implementation.models.RedirectCallRequestInternal;
 import com.azure.communication.callautomation.implementation.models.RejectCallRequestInternal;
 import com.azure.communication.callautomation.implementation.models.TranscriptionConfigurationInternal;
@@ -39,6 +41,7 @@
 import com.azure.communication.callautomation.models.TranscriptionOptions;
 import com.azure.communication.common.CommunicationIdentifier;
 import com.azure.communication.common.CommunicationUserIdentifier;
+import com.azure.communication.common.MicrosoftTeamsAppIdentifier;
 import com.azure.core.annotation.ReturnType;
 import com.azure.core.annotation.ServiceClient;
 import com.azure.core.annotation.ServiceMethod;
@@ -80,10 +83,12 @@ public final class CallAutomationAsyncClient {
     private final HttpPipeline httpPipelineInternal;
     private final String resourceUrl;
     private final CommunicationUserIdentifierModel sourceIdentity;
+    private final MicrosoftTeamsAppIdentifierModel opsSourceIdentity;
     private final CallAutomationEventProcessor eventProcessor;
 
     CallAutomationAsyncClient(AzureCommunicationCallAutomationServiceImpl callServiceClient,
-        CommunicationUserIdentifier sourceIdentity, CallAutomationEventProcessor eventProcessor) {
+        CommunicationUserIdentifier sourceIdentity, MicrosoftTeamsAppIdentifier opsSourceIdentity,
+        CallAutomationEventProcessor eventProcessor) {
         this.callConnectionsInternal = callServiceClient.getCallConnections();
         this.azureCommunicationCallAutomationServiceInternal = callServiceClient;
         this.callRecordingsInternal = callServiceClient.getCallRecordings();
@@ -97,6 +102,8 @@ public final class CallAutomationAsyncClient {
         this.resourceUrl = callServiceClient.getEndpoint();
         this.sourceIdentity
             = sourceIdentity == null ? null : CommunicationUserIdentifierConverter.convert(sourceIdentity);
+        this.opsSourceIdentity
+            = opsSourceIdentity == null ? null : MicrosoftTeamsAppIdentifierConverter.convert(opsSourceIdentity);
     }
 
     /**
@@ -115,6 +122,14 @@ public CommunicationUserIdentifier getSourceIdentity() {
         return sourceIdentity == null ? null : CommunicationUserIdentifierConverter.convert(sourceIdentity);
     }
 
+    /**
+     * Get OPS Source Identity that is used for create OPS call
+     * @return {@link CommunicationUserIdentifier} represent source
+     */
+    public MicrosoftTeamsAppIdentifier getOPSSourceIdentity() {
+        return opsSourceIdentity == null ? null : MicrosoftTeamsAppIdentifierConverter.convert(opsSourceIdentity);
+    }
+
     //region Pre-call Actions
     /**
      * Create a call connection request from a source identity to a target identity.
@@ -224,6 +239,7 @@ private CreateCallRequestInternal getCreateCallRequestInternal(CreateCallOptions
                 PhoneNumberIdentifierConverter.convert(createCallOptions.getCallInvite().getSourceCallerIdNumber()))
             .setSourceDisplayName(createCallOptions.getCallInvite().getSourceDisplayName())
             .setSource(sourceIdentity)
+            .setOpsSource(opsSourceIdentity)
             .setTargets(targetsModel)
             .setCallbackUri(createCallOptions.getCallbackUrl())
             .setCallIntelligenceOptions(callIntelligenceOptionsInternal)
@@ -272,6 +288,7 @@ private CreateCallRequestInternal getCreateCallRequestInternal(CreateGroupCallOp
                 PhoneNumberIdentifierConverter.convert(createCallGroupOptions.getSourceCallIdNumber()))
             .setSourceDisplayName(createCallGroupOptions.getSourceDisplayName())
             .setSource(sourceIdentity)
+            .setOpsSource(opsSourceIdentity)
             .setTargets(targetsModel)
             .setCallbackUri(createCallGroupOptions.getCallbackUrl())
             .setCallIntelligenceOptions(callIntelligenceOptionsInternal)
diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationClientBuilder.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationClientBuilder.java
index a5b953a118175..4f7dddb1c03c8 100644
--- a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationClientBuilder.java
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/CallAutomationClientBuilder.java
@@ -8,6 +8,7 @@
 import com.azure.communication.callautomation.implementation.CustomBearerTokenAuthenticationPolicy;
 import com.azure.communication.callautomation.implementation.CustomHmacAuthenticationPolicy;
 import com.azure.communication.common.CommunicationUserIdentifier;
+import com.azure.communication.common.MicrosoftTeamsAppIdentifier;
 import com.azure.communication.common.implementation.CommunicationConnectionString;
 import com.azure.communication.common.implementation.HmacAuthenticationPolicy;
 import com.azure.core.annotation.ServiceClientBuilder;
@@ -81,6 +82,7 @@ public final class CallAutomationClientBuilder
     private RetryPolicy retryPolicy;
     private RetryOptions retryOptions;
     private CommunicationUserIdentifier sourceIdentity;
+    private MicrosoftTeamsAppIdentifier opsSourceIdentity;
 
     /**
      * Public default constructor
@@ -185,6 +187,16 @@ public CallAutomationClientBuilder sourceIdentity(CommunicationUserIdentifier so
         return this;
     }
 
+    /**
+     * Set One Phone System Source Identity used to create call
+     * @param opsSourceIdentity {@link MicrosoftTeamsAppIdentifier} to used to create call.
+     * @return {@link CallAutomationClientBuilder} object.
+     */
+    public CallAutomationClientBuilder opsSourceIdentity(MicrosoftTeamsAppIdentifier opsSourceIdentity) {
+        this.opsSourceIdentity = opsSourceIdentity;
+        return this;
+    }
+
     /**
      * Sets the retry policy to use (using the RetryPolicy type).
      * <p>
@@ -319,7 +331,8 @@ public CallAutomationClientBuilder addPolicy(HttpPipelinePolicy customPolicy) {
      * and {@link #retryPolicy(RetryPolicy)} have been set.
      */
     public CallAutomationAsyncClient buildAsyncClient() {
-        return new CallAutomationAsyncClient(createServiceImpl(), sourceIdentity, new CallAutomationEventProcessor());
+        return new CallAutomationAsyncClient(createServiceImpl(), sourceIdentity, opsSourceIdentity,
+            new CallAutomationEventProcessor());
     }
 
     /**
diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/CallDialogsImpl.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/CallDialogsImpl.java
index 35612891cf6a7..62ca65b817153 100644
--- a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/CallDialogsImpl.java
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/CallDialogsImpl.java
@@ -211,11 +211,11 @@ public DialogStateResponse startDialog(String callConnectionId, String dialogId,
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
      * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
@@ -230,11 +230,11 @@ public Mono<Response<Void>> stopDialogWithResponseAsync(String callConnectionId,
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @param context The context to associate with this operation.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
@@ -250,11 +250,11 @@ public Mono<Response<Void>> stopDialogWithResponseAsync(String callConnectionId,
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
      * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
@@ -267,11 +267,11 @@ public Mono<Void> stopDialogAsync(String callConnectionId, String dialogId, Stri
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @param context The context to associate with this operation.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
@@ -286,11 +286,11 @@ public Mono<Void> stopDialogAsync(String callConnectionId, String dialogId, Stri
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @param context The context to associate with this operation.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
@@ -304,11 +304,11 @@ public Response<Void> stopDialogWithResponse(String callConnectionId, String dia
     }
 
     /**
-     * Stop a dialog.
+     * The stopDialog operation.
      * 
-     * @param callConnectionId The call connection id.
-     * @param dialogId The dialog id.
-     * @param operationCallbackUri Operation callback URI.
+     * @param callConnectionId The callConnectionId parameter.
+     * @param dialogId The dialogId parameter.
+     * @param operationCallbackUri The operationCallbackUri parameter.
      * @throws IllegalArgumentException thrown if parameters fail the validation.
      * @throws CommunicationErrorResponseException thrown if the request is rejected by server.
      * @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent.
diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/converters/MicrosoftTeamsAppIdentifierConverter.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/converters/MicrosoftTeamsAppIdentifierConverter.java
new file mode 100644
index 0000000000000..5d10d7fc34fc9
--- /dev/null
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/converters/MicrosoftTeamsAppIdentifierConverter.java
@@ -0,0 +1,44 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package com.azure.communication.callautomation.implementation.converters;
+
+import com.azure.communication.callautomation.implementation.models.MicrosoftTeamsAppIdentifierModel;
+import com.azure.communication.common.MicrosoftTeamsAppIdentifier;
+
+/**
+ * A converter for {@link MicrosoftTeamsAppIdentifier} and {@link MicrosoftTeamsAppIdentifierModel}
+ */
+public final class MicrosoftTeamsAppIdentifierConverter {
+
+    /**
+     * Converts to {@link MicrosoftTeamsAppIdentifierModel}.
+     */
+    public static MicrosoftTeamsAppIdentifierModel convert(MicrosoftTeamsAppIdentifier microsoftTeamsAppIdentifier) {
+
+        MicrosoftTeamsAppIdentifierModel microsoftTeamsAppIdentifierModel
+            = (microsoftTeamsAppIdentifier == null || microsoftTeamsAppIdentifier.getAppId().isEmpty())
+                ? null
+                : CommunicationIdentifierConverter
+                    .convert(new MicrosoftTeamsAppIdentifier(microsoftTeamsAppIdentifier.getAppId()))
+                    .getMicrosoftTeamsApp();
+        return microsoftTeamsAppIdentifierModel;
+    }
+
+    /**
+     * Converts to {@link MicrosoftTeamsAppIdentifier}.
+     */
+    public static MicrosoftTeamsAppIdentifier
+        convert(MicrosoftTeamsAppIdentifierModel microsoftTeamsAppIdentifierModel) {
+
+        MicrosoftTeamsAppIdentifier microsoftTeamsAppIdentifier
+            = (microsoftTeamsAppIdentifierModel == null || microsoftTeamsAppIdentifierModel.getAppId().isEmpty())
+                ? null
+                : new MicrosoftTeamsAppIdentifier(microsoftTeamsAppIdentifierModel.getAppId());
+
+        return microsoftTeamsAppIdentifier;
+    }
+
+    private MicrosoftTeamsAppIdentifierConverter() {
+    }
+}
diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/AnswerCallRequestInternal.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/AnswerCallRequestInternal.java
index d6fa330de3523..09f81c06d932d 100644
--- a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/AnswerCallRequestInternal.java
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/AnswerCallRequestInternal.java
@@ -26,6 +26,11 @@ public final class AnswerCallRequestInternal implements JsonSerializable<AnswerC
      */
     private String callbackUri;
 
+    /*
+     * Used by customer to send custom calling context to targets when answering On-Behalf-Of call
+     */
+    private CustomCallingContext customCallingContext;
+
     /*
      * A customer set value used to track the answering of a call.
      */
@@ -97,6 +102,28 @@ public AnswerCallRequestInternal setCallbackUri(String callbackUri) {
         return this;
     }
 
+    /**
+     * Get the customCallingContext property: Used by customer to send custom calling context to targets when answering
+     * On-Behalf-Of call.
+     * 
+     * @return the customCallingContext value.
+     */
+    public CustomCallingContext getCustomCallingContext() {
+        return this.customCallingContext;
+    }
+
+    /**
+     * Set the customCallingContext property: Used by customer to send custom calling context to targets when answering
+     * On-Behalf-Of call.
+     * 
+     * @param customCallingContext the customCallingContext value to set.
+     * @return the AnswerCallRequestInternal object itself.
+     */
+    public AnswerCallRequestInternal setCustomCallingContext(CustomCallingContext customCallingContext) {
+        this.customCallingContext = customCallingContext;
+        return this;
+    }
+
     /**
      * Get the operationContext property: A customer set value used to track the answering of a call.
      * 
@@ -208,6 +235,7 @@ public JsonWriter toJson(JsonWriter jsonWriter) throws IOException {
         jsonWriter.writeStartObject();
         jsonWriter.writeStringField("incomingCallContext", this.incomingCallContext);
         jsonWriter.writeStringField("callbackUri", this.callbackUri);
+        jsonWriter.writeJsonField("customCallingContext", this.customCallingContext);
         jsonWriter.writeStringField("operationContext", this.operationContext);
         jsonWriter.writeJsonField("mediaStreamingConfiguration", this.mediaStreamingConfiguration);
         jsonWriter.writeJsonField("transcriptionConfiguration", this.transcriptionConfiguration);
@@ -236,6 +264,8 @@ public static AnswerCallRequestInternal fromJson(JsonReader jsonReader) throws I
                     deserializedAnswerCallRequestInternal.incomingCallContext = reader.getString();
                 } else if ("callbackUri".equals(fieldName)) {
                     deserializedAnswerCallRequestInternal.callbackUri = reader.getString();
+                } else if ("customCallingContext".equals(fieldName)) {
+                    deserializedAnswerCallRequestInternal.customCallingContext = CustomCallingContext.fromJson(reader);
                 } else if ("operationContext".equals(fieldName)) {
                     deserializedAnswerCallRequestInternal.operationContext = reader.getString();
                 } else if ("mediaStreamingConfiguration".equals(fieldName)) {
diff --git a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/CreateCallRequestInternal.java b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/CreateCallRequestInternal.java
index 56740cc6567bc..1b2e23c40b953 100644
--- a/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/CreateCallRequestInternal.java
+++ b/sdk/communication/azure-communication-callautomation/src/main/java/com/azure/communication/callautomation/implementation/models/CreateCallRequestInternal.java
@@ -38,6 +38,11 @@ public final class CreateCallRequestInternal implements JsonSerializable<CreateC
      */
     private CommunicationUserIdentifierModel source;
 
+    /*
+     * The identifier of the source in an OPS call
+     */
+    private MicrosoftTeamsAppIdentifierModel opsSource;
+
     /*
      * A customer set value used to track the answering of a call.
      */
@@ -158,6 +163,26 @@ public CreateCallRequestInternal setSource(CommunicationUserIdentifierModel sour
         return this;
     }
 
+    /**
+     * Get the opsSource property: The identifier of the source in an OPS call.
+     * 
+     * @return the opsSource value.
+     */
+    public MicrosoftTeamsAppIdentifierModel getOpsSource() {
+        return this.opsSource;
+    }
+
+    /**
+     * Set the opsSource property: The identifier of the source in an OPS call.
+     * 
+     * @param opsSource the opsSource value to set.
+     * @return the CreateCallRequestInternal object itself.
+     */
+    public CreateCallRequestInternal setOpsSource(MicrosoftTeamsAppIdentifierModel opsSource) {
+        this.opsSource = opsSource;
+        return this;
+    }
+
     /**
      * Get the operationContext property: A customer set value used to track the answering of a call.
      * 
@@ -292,6 +317,7 @@ public JsonWriter toJson(JsonWriter jsonWriter) throws IOException {
         jsonWriter.writeJsonField("sourceCallerIdNumber", this.sourceCallerIdNumber);
         jsonWriter.writeStringField("sourceDisplayName", this.sourceDisplayName);
         jsonWriter.writeJsonField("source", this.source);
+        jsonWriter.writeJsonField("opsSource", this.opsSource);
         jsonWriter.writeStringField("operationContext", this.operationContext);
         jsonWriter.writeJsonField("mediaStreamingConfiguration", this.mediaStreamingConfiguration);
         jsonWriter.writeJsonField("transcriptionConfiguration", this.transcriptionConfiguration);
@@ -329,6 +355,8 @@ public static CreateCallRequestInternal fromJson(JsonReader jsonReader) throws I
                     deserializedCreateCallRequestInternal.sourceDisplayName = reader.getString();
                 } else if ("source".equals(fieldName)) {
                     deserializedCreateCallRequestInternal.source = CommunicationUserIdentifierModel.fromJson(reader);
+                } else if ("opsSource".equals(fieldName)) {
+                    deserializedCreateCallRequestInternal.opsSource = MicrosoftTeamsAppIdentifierModel.fromJson(reader);
                 } else if ("operationContext".equals(fieldName)) {
                     deserializedCreateCallRequestInternal.operationContext = reader.getString();
                 } else if ("mediaStreamingConfiguration".equals(fieldName)) {
diff --git a/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationAsyncClientUnitTests.java b/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationAsyncClientUnitTests.java
index 8894b71501cf5..e0a4fd89412ac 100644
--- a/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationAsyncClientUnitTests.java
+++ b/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationAsyncClientUnitTests.java
@@ -14,6 +14,8 @@
 import com.azure.communication.callautomation.models.RejectCallOptions;
 import com.azure.communication.common.CommunicationIdentifier;
 import com.azure.communication.common.CommunicationUserIdentifier;
+import com.azure.communication.common.MicrosoftTeamsAppIdentifier;
+import com.azure.communication.common.PhoneNumberIdentifier;
 import com.azure.core.http.rest.Response;
 import org.junit.jupiter.api.Test;
 
@@ -52,6 +54,25 @@ public void createCall() {
         assertNotNull(createCallResult);
     }
 
+    @Test
+    public void createOPSCall() {
+        CallAutomationAsyncClient callAutomationAsyncClient
+            = getCallAutomationAsyncClient(new ArrayList<>(Collections.singletonList(
+                new AbstractMap.SimpleEntry<>(generateOPSCallProperties(CALL_CONNECTION_ID, CALL_SERVER_CALL_ID,
+                    PHONE_NUMBER, CALL_CONNECTION_STATE, CALL_CALLBACK_URL, MICROSOFT_TEAMS_APP_ID), 201))));
+        List<CommunicationIdentifier> targets
+            = new ArrayList<>(Collections.singletonList(new PhoneNumberIdentifier(PHONE_NUMBER)));
+
+        CreateCallResult createCallResult
+            = callAutomationAsyncClient.createGroupCall(targets, CALL_CALLBACK_URL).block();
+        assertNotNull(createCallResult);
+        assertEquals(MICROSOFT_TEAMS_APP_ID,
+            ((MicrosoftTeamsAppIdentifier) createCallResult.getCallConnectionProperties().getSource()).getAppId());
+        assertEquals(PHONE_NUMBER,
+            ((PhoneNumberIdentifier) createCallResult.getCallConnectionProperties().getTargetParticipants().get(0))
+                .getPhoneNumber());
+    }
+
     @Test
     public void createGroupCallWithResponse() {
         CallAutomationAsyncClient callAutomationAsyncClient = getCallAutomationAsyncClient(new ArrayList<>(
diff --git a/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationUnitTestBase.java b/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationUnitTestBase.java
index 8d0a743f905fa..b9304ce4f0434 100644
--- a/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationUnitTestBase.java
+++ b/sdk/communication/azure-communication-callautomation/src/test/java/com/azure/communication/callautomation/CallAutomationUnitTestBase.java
@@ -16,8 +16,13 @@
 import com.azure.communication.callautomation.implementation.models.CallConnectionPropertiesInternal;
 import com.azure.communication.callautomation.implementation.models.CallConnectionStateModelInternal;
 import com.azure.communication.callautomation.implementation.models.CallParticipantInternal;
+import com.azure.communication.callautomation.implementation.models.CommunicationCloudEnvironmentModel;
+import com.azure.communication.callautomation.implementation.models.CommunicationIdentifierModel;
+import com.azure.communication.callautomation.implementation.models.CommunicationIdentifierModelKind;
 import com.azure.communication.callautomation.implementation.models.GetParticipantsResponseInternal;
 import com.azure.communication.callautomation.implementation.models.DialogStateResponse;
+import com.azure.communication.callautomation.implementation.models.MicrosoftTeamsAppIdentifierModel;
+import com.azure.communication.callautomation.implementation.models.PhoneNumberIdentifierModel;
 import com.azure.communication.callautomation.models.MediaStreamingAudioChannel;
 import com.azure.communication.callautomation.models.MediaStreamingOptions;
 import com.azure.communication.callautomation.models.MediaStreamingContent;
@@ -55,6 +60,8 @@ public class CallAutomationUnitTestBase {
     static final String DATA_SUBSCRIPTION_ID = "dataSubscriptionId";
     static final String DIALOG_ID = "dialogId";
     static final String BOT_APP_ID = "botAppId";
+    static final String MICROSOFT_TEAMS_APP_ID = "28:acs:redacted";
+    static final String PHONE_NUMBER = "+18001234567";
 
     static final MediaStreamingOptions MEDIA_STREAMING_CONFIGURATION
         = new MediaStreamingOptions("https://websocket.url.com", MediaStreamingTransport.WEBSOCKET,
@@ -84,6 +91,25 @@ public static String generateCallProperties(String callConnectionId, String serv
         return serializeObject(result);
     }
 
+    public static String generateOPSCallProperties(String callConnectionId, String serverCallId, String targetId,
+        String connectionState, String callbackUri, String opsSourceId) {
+        CallConnectionPropertiesInternal result = new CallConnectionPropertiesInternal()
+            .setCallConnectionId(callConnectionId)
+            .setServerCallId(serverCallId)
+            .setCallbackUri(callbackUri)
+            .setCallConnectionState(CallConnectionStateModelInternal.fromString(connectionState))
+            .setSource(new CommunicationIdentifierModel().setRawId(opsSourceId)
+                .setKind(CommunicationIdentifierModelKind.MICROSOFT_TEAMS_APP)
+                .setMicrosoftTeamsApp(new MicrosoftTeamsAppIdentifierModel().setAppId(opsSourceId)
+                    .setCloud(CommunicationCloudEnvironmentModel.PUBLIC)))
+            .setTargets(
+                new ArrayList<>(Collections.singletonList(new CommunicationIdentifierModel().setRawId("+4:" + targetId)
+                    .setKind(CommunicationIdentifierModelKind.PHONE_NUMBER)
+                    .setPhoneNumber(new PhoneNumberIdentifierModel().setValue(targetId)))));
+
+        return serializeObject(result);
+    }
+
     public static String generateGetParticipantResponse(String callerId, boolean isMuted, boolean isHold) {
         CallParticipantInternal callParticipant
             = ModelGenerator.generateAcsCallParticipantInternal(callerId, isMuted, isHold);
diff --git a/sdk/communication/azure-communication-callautomation/swagger/README.md b/sdk/communication/azure-communication-callautomation/swagger/README.md
index e71dd1c9ec59b..9b564754c221f 100644
--- a/sdk/communication/azure-communication-callautomation/swagger/README.md
+++ b/sdk/communication/azure-communication-callautomation/swagger/README.md
@@ -21,7 +21,7 @@ There is one swagger for Calling management APIs.
 
 ```ps
 cd <swagger-folder>
-autorest README.md --java --v4 --use=@autorest/java@4.0.20 --use=@autorest/modelerfour@4.15.442
+autorest README.md --java --v4
 ```
 
 ### Code generation settings
@@ -29,7 +29,7 @@ autorest README.md --java --v4 --use=@autorest/java@4.0.20 --use=@autorest/model
 tag: package-2023-10-03-preview
 use: '@autorest/java@4.1.29'
 require:
-    - https://github.com/Azure/azure-rest-api-specs/blob/156ff363e44f764ddd8a0a6adcd371610240ba15/specification/communication/data-plane/CallAutomation/readme.md
+    - https://github.com/Azure/azure-rest-api-specs/blob/be2a0fa68829fcb15c4e6b47aa6bc4bdd566c1cf/specification/communication/data-plane/CallAutomation/readme.md
 java: true
 output-folder: ../
 license-header: MICROSOFT_MIT_SMALL