As serial-based PCIe bus devices, such as IEEE1394 (FireWire), become less active, it is possible for the computer's power management system to take the opportunity to reduce overall power consumption by placing the link PHY into a low-power mode and instructing other devices on the link to follow suit.
A laptop with an Intel host adapter using an Alereon PHY was used to transfer high definition video from a Philips wireless semiconductor solution with a Staccato Communications PHY, all using Microsoft Windows XP drivers developed for Wireless USB.