Hello,
As you might know that a G.SHDSL interface card provides one RJ45 physical interface that can be virtualized into four G.SHDSL interfaces. G.SHDSL interfaces support the bonding function.
Actually, the four G.SHDSL interfaces support the bonding of the following modes (only the interface with an even number can function as the primary interface):
Bonding of interfaces 0 and 1
Bonding of interfaces 0, 1, and 2
Bonding of interfaces 0, 1, 2, and 3
Bonding of interfaces 2 and 3
Hope this knowledge is helpful to you.