DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   E2
      <communications> A European framing specification for the
      transmission of four multiplexed E1 data streams, resulting
      in a transmission rate of 8.448 Mb/s (= 8448 kb/s).
      (2002-03-22)