u Introduction 
  §    Premium GBIC-SX55  is fully compliant with GBIC specification SFF-8053, Rev 5.5.
  §    It meets the requirements of IEEE 802.3 Gigabit  Ethernet  standard and  ANSI FC specifications, 
              and is very suitable for interconnections in Gigabit  Ethernet  and  Fibre Channel  environments              
  §   This module is designed  for use with multi mode fiber and operates at a wavelength of 850nm.