diff --git a/htdocs/telephonie/script/etude-facturation.php b/htdocs/telephonie/script/etude-facturation.php
new file mode 100644
index 00000000000..1e5c41821ff
--- /dev/null
+++ b/htdocs/telephonie/script/etude-facturation.php
@@ -0,0 +1,102 @@
+<?PHP
+/* Copyright (C) 2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Id$
+ * $Source$
+ *
+ *
+ * Script de facturation
+ * Verification des factures négatives
+ *
+ */
+
+/**
+   \file       htdocs/telephonie/script/facturation-analyse.php
+   \ingroup    telephonie
+   \brief      Analyse de la facturation
+   \version    $Revision$
+*/
+
+
+require ("../../master.inc.php");
+
+/*
+ *
+ */
+
+$datetime = time();
+$date = strftime("%d%h%Y%Hh%Mm%S",$datetime);
+$month = strftime("%m", $datetime);
+$year = strftime("%Y", $datetime);
+
+if ($month == 1)
+{
+  $month = "12";
+  $year = $year - 1;
+}
+else
+{
+  $month = substr("00".($month - 1), -2) ;
+}
+
+$sql  = "SELECT fk_tarif, fk_client, temporel, fixe, fk_user, datec ";
+$sql .= " FROM llx_telephonie_tarif_client_log";
+$sql .= " WHERE date_format(datec,'%m%Y')='".$month.year."'";
+$sql .= " ORDER BY datec ASC;";
+
+$re2sql = $db->query($sql) ;
+
+if ( $re2sql )
+{
+  $nu2m = $db->num_rows($re2sql);
+  print "$nu2m tarifs modifiés\n";
+  $j = 0;
+  while ($j < $nu2m)
+    {
+      $row = $db->fetch_row($re2sql);
+
+      $sqli  = "SELECT fk_tarif, fk_client, temporel, fixe, fk_user, datec ";
+      $sqli .= " FROM llx_telephonie_tarif_client_log";
+      $sqli .= " WHERE fk_tarif = ".$row[0];
+      $sqli .= " AND fk_client = ".$row[1];
+      $sqli .= " ORDER BY datec ASC";
+
+      $resqli = $db->query($sqli) ;
+
+      if ($resqli )
+	{
+	  $numi = $db->num_rows($resqli);      
+	  if ($numi > 2)
+	    {
+	      while ( $rowi = $db->fetch_row($resqli))
+		{
+		  print $rowi[0]." ".$rowi[2]."\n";
+		}
+	    }
+	}
+
+      $j++;
+    }
+}
+else
+{
+  print $db->error();
+}
+
+
+$db->close();
+?>