Lo primero gracias por responder,si tengo otro motorola dado de alta he intentado entrar para ver lo que me has dicho y esto es lo que me pone...

Configuration Manager
Help
This page provides information about the startup process of the Cable Modem. If there is a problem with the startup, the word "Failed" may appear in the Status column. Should this occur, visit the Help area and perform the Checkup procedures listed there. If the problem continues, click on the word "Failed" for more detailed information about the failure, or call your service provider for assistance.

que me sujieres gracias un saludo.