10G cable direct attach copper cable is made by twinax

Xenpak transceiver is packed in a 4.8 x 1.4 x 0.7 inch package, use DFB laser components, Xenpak working distance via G652 multimode fiber could reach up to 10km, another important components inside the Xenpak is the MUX/DEMUX parts, it consume 50% of the power and result in the bigger size. XENPAK modules are offered for physical layer interfaces supporting multi-mode and single mode fiber optic cables and InfiniBand copper cables with connectors referred to as CX4. Transmission distances vary from 100 metres (330 ft) to 80 kilometres (50 mi) for fiber and as much as 15 metres (49 ft) on 10G cable Fibre Channel. Newer XENPAKs while using 10GBase-LX4 standard operated using multiple wavelengths on legacy multi-mode fibres at distances of up to 300 metres (980 ft), eliminating the necessity to reinstall cable in a building when upgrading certain 1 Gbit/s circuits to 10 Gbit/s.SFP+ AOC is SFP+ active optic cable;it’s made by optical cable which integrated with two SFP+ transceivers. 10G cable Difference between  direct attach copper cable is made by twinax copper cable. They are all high speed cables, but AOC is better than direct attach copper cable, because it’s more steady and lower loss, however, it’s price will be higher than direct attach copper cable.