diff --git a/configuration.php b/configuration.php
index cb36404..249d68a 100644
--- a/configuration.php
+++ b/configuration.php
@@ -34,7 +34,11 @@ class Configuration {
         ),
         'log' => array(
             'file' => 'c:\\logs\\ws_ipad.txt',
-            'verbosity' => 0, // The greater the verbosity, the more is displayed
+            // The greater the verbosity, the more is displayed
+            // 0 : no log at all
+            // 1 : log function calls and errors
+            // 2 : log parameters and sent data
+            'verbosity' => 0,
         ),
         'session' => array(
             'save_path' => ''