diff --git a/components/control_plane/internal/control_plane_internal.h b/components/control_plane/internal/control_plane_internal.h
index 4f080aa..21ec56b 100644
--- a/components/control_plane/internal/control_plane_internal.h
+++ b/components/control_plane/internal/control_plane_internal.h
@@ -145,6 +145,7 @@ bool control_plane_local_wake_prompt_gate_active(void);
 void control_plane_ptt_reset_capture_window(void);
 bool control_plane_voice_turn_is_idle(void);
 bool control_plane_ota_voice_services_allowed(void);
+bool control_plane_ota_business_interactions_allowed(void);
 bool control_plane_runtime_is_stopping(void);
 
 esp_err_t control_plane_battery_service_stop(int timeout_ms);
diff --git a/components/control_plane/src/multimodal/control_plane_multimodal_runtime.c b/components/control_plane/src/multimodal/control_plane_multimodal_runtime.c
index 4581efb..77578be 100644
--- a/components/control_plane/src/multimodal/control_plane_multimodal_runtime.c
+++ b/components/control_plane/src/multimodal/control_plane_multimodal_runtime.c
@@ -686,6 +686,10 @@ esp_err_t control_plane_multimodal_request_to_respond(
 
 esp_err_t control_plane_request_cloud_chouqian(void)
 {
+    if (!control_plane_ota_business_interactions_allowed()) {
+        return ESP_ERR_INVALID_STATE;
+    }
+
     uint32_t requested_ms = control_plane_now_ms();
 
     portENTER_CRITICAL(&s_multimodal_runtime_lock);
diff --git a/components/control_plane/src/runtime/control_plane_ota.c b/components/control_plane/src/runtime/control_plane_ota.c
index 6d16bcf..c293c95 100644
--- a/components/control_plane/src/runtime/control_plane_ota.c
+++ b/components/control_plane/src/runtime/control_plane_ota.c
@@ -140,6 +140,17 @@ bool control_plane_ota_voice_services_allowed(void)
     return allowed;
 }
 
+bool control_plane_ota_business_interactions_allowed(void)
+{
+    bool allowed;
+    portENTER_CRITICAL(&s_ota_lock);
+    allowed = !s_ota_voice_services_reserved &&
+              s_ota_snapshot.state != CONTROL_PLANE_OTA_STATE_DOWNLOADING &&
+              s_ota_snapshot.state != CONTROL_PLANE_OTA_STATE_READY_TO_REBOOT;
+    portEXIT_CRITICAL(&s_ota_lock);
+    return allowed;
+}
+
 static void control_plane_ota_set_state(control_plane_ota_state_t state,
                                         esp_err_t error,
                                         int http_status)
diff --git a/components/control_plane/src/runtime/control_plane_runtime_workers.c b/components/control_plane/src/runtime/control_plane_runtime_workers.c
index 444c207..4ff9001 100644
--- a/components/control_plane/src/runtime/control_plane_runtime_workers.c
+++ b/components/control_plane/src/runtime/control_plane_runtime_workers.c
@@ -688,6 +688,11 @@ static void control_plane_set_ptt_active_with_trigger(
         return;
     }
 
+    if (!control_plane_ota_business_interactions_allowed()) {
+        ESP_LOGI(TAG, "PTT activation ignored during OTA");
+        return;
+    }
+
     control_plane_local_wake_pause_for_foreground();
     ptt_state_t old_state = PTT_STATE_IDLE;
     ptt_state_t new_state = PTT_STATE_IDLE;
diff --git a/components/control_plane/src/runtime/control_plane_system_events.c b/components/control_plane/src/runtime/control_plane_system_events.c
index 05daa10..ccaf6a1 100644
--- a/components/control_plane/src/runtime/control_plane_system_events.c
+++ b/components/control_plane/src/runtime/control_plane_system_events.c
@@ -140,6 +140,20 @@ static void control_plane_dispatch_key_event(const control_plane_key_event_t *ev
         return;
     }
 
+    if (!control_plane_ota_business_interactions_allowed()) {
+        if (event->key_id == CONTROL_PLANE_KEY_ID_PTT &&
+            (event->type == CONTROL_PLANE_KEY_EVENT_RELEASED ||
+             event->type == CONTROL_PLANE_KEY_EVENT_LONG_PRESS_RELEASE ||
+             event->type == CONTROL_PLANE_KEY_EVENT_CANCELLED)) {
+            control_plane_set_ptt_active(false);
+        }
+        ESP_LOGI(TAG,
+                 "Business key ignored during OTA: key=%s type=%s",
+                 control_plane_key_id_name(event->key_id),
+                 control_plane_key_event_type_name(event->type));
+        return;
+    }
+
     if (event->key_id == CONTROL_PLANE_KEY_ID_SW2) {
         if (event->type == CONTROL_PLANE_KEY_EVENT_SHORT_PRESS) {
             esp_err_t request_err = control_plane_request_cloud_chouqian();