0.5% GRADE OF SERVICE This topic has 0 replies, 1 voice, and was last updated 23 years, 6 months ago by LIM KIM PANG. Viewing 1 post (of 1 total) Author Posts 11th July 2001 at 07:09 #20555 LIM KIM PANGGuest Hi, Anyone know how the formula for calculating Erlang?? The customer required 0.5% grade of service and Erlang of 227.5. Author Posts Viewing 1 post (of 1 total) The forum ‘Voice over IP’ is closed to new topics and replies.