I have just upgraded to a BT Home Hub 5, with an upgrade to BT Infinity within a few days.
When connecting my Sure Signal 3 it runs through the setup and finishes with a flashing Power light and an orange steady in service and in use light.
This is a nice touch and makes it easy to configure devices requiring wireless connections, by taking this tab to the device.
On this page you can also see if you have USB storage attached.
We leave a 16Gb USB pendrive connected as a mechanism to share documents between computers and other devices in our home.
Under windows 7 file explorer a device called BTHUB3 is present and has a mapped drive called usb1.
They all ended up being blue and everything just worked. Better still, they don't flash in normal operation.I have tried numerous resets on the Sure Signal with the same results. This same Sure Signal works fine with my original Home Hub 4. Net Protect Plus is free to option 2 & 3 customers.Option 1 customers can purchase the security package for a small monthly charge.