E5

from The Free On-line Dictionary of Computing (8 July 2008)

E5

   <communications> A European {framing specification} for the
   transmission of 256 multiplexed {E1} data streams, resulting
   in a transmission rate of 565.148 Mbps (= 565,148 kb/s).

   (2002-03-22)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

E5
       European digital transmission format 5 [565.148 Mbps]