extranet/application/models/Naf5.php

<?php
class Application_Model_Naf5 extends Zend_Db_Table_Abstract
{
	protected $_name = 'tabnaf5';
	
	public function __construct()
	{
		if (empty($config) && Zend_Registry::isRegistered('configuration')){
			$configuration = Zend_Registry::get('configuration');
			$this->_db = Zend_Db::factory($configuration->databases->db->sdv1);
		} elseif(empty($config)){
			$dbConfig = new Zend_Config_Ini(APPLICATION_PATH.'/configs/configuration.ini', 'databases');
			$this->_db = Zend_Db::factory($dbConfig->db->sdv1);			
		}
	}
	
}