I found that I can attach a lot of USB devices to my ( NEW:) ) C1000 through a USB A host cable: A 2G USB thumb drive, a USB Bluetooth 2.0 dongle, and etc.
I wonder what voltage can C1000 provide to the USB devices--5V, or 3.3V?
I also realized that I will need a Powered USB HUB. I've got a little one that I bought a year ago at a very low price. It has a 5V AC Adaptor. Can I use it with C1000?