The XENPAK Transceiver provides convenient long haul 10 Gigabit Ethernet connectivity for distances up to 80 km on 1550 nm single-mode fiber (SMF). he XENPAK pluggable interface is an industry standard or Multisource Agreement (MSA) for pluggable 10 Gigabit Ethernet Optics. The XENPAK Transceiver is used for long-reach service provider interconnect and metro Ethernet rings.
Full specifications (PDF)
Manufacturer part number: 10116E