This Recommendation specifies portions of clause 61 of IEEE Standard 802.3ah-2004 amendment to Carrier Sense Multiple Access with Collision Detection (CSMA/CD) access method and physical layer specification as a normative reference and identifies the requirementsfor multi-pair bonding in IEEE 802.3ah-2004 that are different in the United States. Further, this Recommendation specifies the requirements for extending the bonding methods in IEEE 802.3ah-2004 to xDSL technologies other than VDSL and SHDSL.