Quote:
Originally Posted by vpr5703
The only issue with attatching keyboards to phones is that the USB controller in the handset can not be a host. On USB architechture there are hosts and slaves. The host is typically the USB port on your computer you attatch things to, or a USB hub. The slave is the attatched device, be it a mouse, keyboard, or external hard drive. The issue is that a slave does not supply power, only consumes it. Also, the controllers are hard coded to be either one. Some new controllers are supposedly being designed that can flip roles, but for now, USB still defines devices as either host or slave. By attatching a keyboard to your handset, you'd be attatching a slave device to a slave device. Neither one would be able to communicate with the other. Hope this helps!
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Actually, The phone Can act as a Host Device
You can even attach
a usb thumbdrive to the phone for storage. But the only problem
is that you need to supply extra power to the keyboard because the
phone does not supply power through the port to another device.