Blinking Mute Button Document ID: 108785 Contents IntroductionWhat can I do if the mute button is blinking red when I power it on?Related Information Introduction This article is one in a series to assist in the setup, troubleshooting, and maintenance of Cisco Small Business products. Q. What can I do if the mute button is blinking red when I power it on? A. Blinking Mute Button If theMute button is blinking , it means the cable is not attached properly or it is unplugged. Make sure the cable is properly attached to the WAN port of the SPA and the other end to your router, switch, and network. Related Information • Technical Support &Documentation − Cisco Systems Updated: Dec 12, 2008 Document ID: 108785