R99 , HS ,EUL This topic has 1 reply, 1 voice, and was last updated 10 years, 4 months ago by Lou. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts 3rd May 2012 at 12:41 #68177 misaGuest what is the difference between those terms R99 , HS and EUL 4th September 2014 at 10:59 #68178 LouGuest what is the difference between those terms R99 , HS and EUL Author Posts Viewing 2 posts - 1 through 2 (of 2 total) The forum ‘Telecom Design’ is closed to new topics and replies.