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1. (WO2010078179) UNIVERSAL SERIAL BUS HOST TO HOST COMMUNICATIONS
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CLAIMS

What is claimed is:

1. An apparatus comprising: a detector to detect a host or device coupled via a link; and a port to negotiate with a port of the detected host or device and to determine whether to operate as a host and/or as a device.

2. The apparatus of claim 1, wherein the host is a Universal Serial Bus host, the device is a Universal Serial Bus device, and the link is a USB cable.

3. The apparatus of claim 2, wherein the USB host is a Universal Serial Bus 3.0 host, the USB device is a Universal Serial Bus 3.0 device, and the USB cable is a USB 3.0 cable.

4. The apparatus of claim 1, wherein the link is a USB A to USB A type USB cable.

5. The apparatus of claim 1, wherein the link is a USB A to USB A type USB 3.0 cable.

6. The apparatus of claim 1, wherein when the port operates as a device the apparatus externally appears to be a device.

7. The apparatus of claim 1, wherein the port operates as a host and as a device.

8. A system comprising: a first host; a second host; and wherein the second host includes: a detector to detect the first host coupled to the second host via a link; and a port to negotiate with a port of the first host and to determine whether to operate the second host as a host and/or as a device..

9. The system of claim 8, wherein the first host is a Universal Serial Bus host, the second host is a Universal Serial Bus host, and the link is a USB cable.

10. The system of claim 8, wherein the first host is a Universal Serial Bus 3.0 host, the second host is a Universal Serial Bus 3.0 host, and the link is a USB 3.0 cable.

11. The system of claim 8, wherein the link is a USB A to USB A type USB cable.

12. The system of claim 8, wherein the link is a USB A to USB A type USB 3.0 cable.

13. The system of claim 8, wherein when the second host operates as a device it appears to the first host to be a device.

14. The system of claim 8, wherein the second host operates as a host and as a device.

15. A method comprising: detecting a host or device coupled via a link; negotiating with a port of the detected host or device; and determining whether to operate as a host and/or as a device in response to the negotiating.

16. The method of claim 15, wherein the link is a USB cable, and wherein the determining determines whether to operate as a USB host and/or as a USB device.

17. The method of claim 15, wherein the link is a USB 3.0 cable, and wherein the determining determines whether to operate as a USB 3.0 host and/or as a USB 3.0 device.

18. The method of claim 15, wherein the link is a USB A to USB A type USB cable.

19. The method of claim 15, wherein the link is a USB A to USB A type USB 3.0 cable.

20. The method of claim 15, wherein the second host operates as both a host and a device.