diff --git a/media/libmediahelper/TypeConverter.cpp b/media/libmediahelper/TypeConverter.cpp
index 6ea617272a..aa54b8273e 100644
--- a/media/libmediahelper/TypeConverter.cpp
+++ b/media/libmediahelper/TypeConverter.cpp
@@ -358,6 +358,7 @@ const UsageTypeConverter::Table UsageTypeConverter::mTable[] = {
     MAKE_STRING_FROM_ENUM(AUDIO_USAGE_GAME),
     MAKE_STRING_FROM_ENUM(AUDIO_USAGE_VIRTUAL_SOURCE),
     MAKE_STRING_FROM_ENUM(AUDIO_USAGE_ASSISTANT),
+    MAKE_STRING_FROM_ENUM(AUDIO_USAGE_CALL_ASSISTANT),
     TERMINATOR
 };
 
diff --git a/services/audiopolicy/engine/common/src/EngineDefaultConfig.h b/services/audiopolicy/engine/common/src/EngineDefaultConfig.h
index fede0d93de..20c57ee70d 100644
--- a/services/audiopolicy/engine/common/src/EngineDefaultConfig.h
+++ b/services/audiopolicy/engine/common/src/EngineDefaultConfig.h
@@ -107,6 +107,13 @@ const engineConfig::ProductStrategies gOrderedStrategies = {
          }
      },
     },
+    {"STRATEGY_CALL_ASSISTANT",
+     {
+         {"", AUDIO_STREAM_PATCH, "AUDIO_STREAM_PATCH",
+          {{AUDIO_CONTENT_TYPE_UNKNOWN, AUDIO_USAGE_CALL_ASSISTANT, AUDIO_SOURCE_DEFAULT, 0, ""}}
+         }
+     },
+    },
     {"STRATEGY_TRANSMITTED_THROUGH_SPEAKER",
      {
          {"", AUDIO_STREAM_TTS, "AUDIO_STREAM_TTS",
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index b34928d35f..a3fa974c9c 100755
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -53,6 +53,7 @@ static const std::vector<legacy_strategy_map> gLegacyStrategy = {
     { "STRATEGY_ACCESSIBILITY", STRATEGY_ACCESSIBILITY },
     { "STRATEGY_REROUTING", STRATEGY_REROUTING },
     { "STRATEGY_PATCH", STRATEGY_REROUTING }, // boiler to manage stream patch volume
+    { "STRATEGY_CALL_ASSISTANT", STRATEGY_CALL_ASSISTANT },
 };
 
 Engine::Engine()
@@ -443,6 +444,10 @@ DeviceVector Engine::getDevicesForStrategyInt(legacy_strategy strategy,
         }
         } break;
 
+    case STRATEGY_CALL_ASSISTANT:
+        devices = availableOutputDevices.getDevicesFromType(AUDIO_DEVICE_OUT_TELEPHONY_TX);
+        break;
+
     default:
         ALOGW("getDevicesForStrategy() unknown strategy: %d", strategy);
         break;
diff --git a/services/audiopolicy/enginedefault/src/Engine.h b/services/audiopolicy/enginedefault/src/Engine.h
index 4360c6fe66..bb9e2df3a4 100644
--- a/services/audiopolicy/enginedefault/src/Engine.h
+++ b/services/audiopolicy/enginedefault/src/Engine.h
@@ -39,6 +39,7 @@ enum legacy_strategy {
     STRATEGY_TRANSMITTED_THROUGH_SPEAKER,
     STRATEGY_ACCESSIBILITY,
     STRATEGY_REROUTING,
+    STRATEGY_CALL_ASSISTANT,
 };
 
 class Engine : public EngineBase
diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
index 2e3f2d84f6..9d80a1663d 100644
--- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
+++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp
@@ -6113,6 +6113,7 @@ bool AudioPolicyManager::isValidAttributes(const audio_attributes_t *paa)
     case AUDIO_USAGE_GAME:
     case AUDIO_USAGE_VIRTUAL_SOURCE:
     case AUDIO_USAGE_ASSISTANT:
+    case AUDIO_USAGE_CALL_ASSISTANT:
         break;
     default:
         return false;