Optimum call centre level This topic has 0 replies, 1 voice, and was last updated 22 years, 5 months ago by Arunas. Viewing 1 post (of 1 total) Author Posts 8th December 2000 at 10:25 #33149 ArunasGuest What is optimal service level for call centre in percentage? ( answer calls ). Thanks for all. Author Posts Viewing 1 post (of 1 total) The forum ‘Telecom Design’ is closed to new topics and replies.