diff --git a/htdocs/telephonie/script/graph-statistiques-lignes.php b/htdocs/telephonie/script/graph-statistiques-lignes.php
index 09337e3dd12..e383e3e4da0 100644
--- a/htdocs/telephonie/script/graph-statistiques-lignes.php
+++ b/htdocs/telephonie/script/graph-statistiques-lignes.php
@@ -54,10 +54,11 @@ while ( $childrenNow < $childrenTotal )
     }
   else
     {
-      usleep(10000);
       $process = new ProcessGraphLignes( $childrenNow, $clientPerChild );
       $process->go();
       die();
-    }  
+    }
+
+  usleep(100000);
 }
 ?>