XENPAK Transceiver modules are offered

10G XENPAK Module is a highly integrated, Serial optical transponder module for high-speed, 10Gbit/s data transmission applications. Xenpak transceiver is packed in a  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 Transceiver 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 CX4 cable. Newer XENPAK Transceiver 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.

Xenpak is 10G fiber optic transceiver, it support all optical ports as defined in IEEE 802.3ae, supporting speed 10.3 Gb/s,9.95 Gb/s or4×3.125 Gb/s. XENPAK Transceiver modules designed XAUI interface and data shaping (CDR) function, which comply with the XENPAK Transceiver MSA protocol and meet the application of 802.3ae Ethernet protocol 10GB.