IEEE 802.15.4-2003, IEEE 802.15.4-2006 Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPANs)
IEEE 802.15.4c-2009 Amendment 2: Alternative Physical Layer Extension to support one or more of the Chinese 314 - 316 MHz, 430 - 434 MHz, and 779 - 787 MHz bands