What should I do if the gateway does not detect my fiber cable?

Make sure that the SFP optic module is installed properly, use the correct fiber cable, and ensure it's plugged into a valid wall jack. Also confirm AT&T has activated your fiber line. If issues persist after checking these areas, contact AT&T support at 1-800-288-2020 or via their website (www.att.com/support). (Page 23)