00290nam a2200133Ia 4500003000400000005001700004008004100021020001800062040001000080100001300090245003300103260001100136260000900147OSt20240210150606.0170524s9999    xx            000 0 und d  a9781259006876  cIIMTU  aKeiser G 0aOptical Fiber Communications  bT.M.H.  c2012