Define This topic has 2 replies, 1 voice, and was last updated 17 years, 3 months ago by VK. Viewing 3 posts - 1 through 3 (of 3 total) Author Posts 17th December 2002 at 17:35 #34942 SchristyGuest In regards to a PSTN, could someone define the parameters CSSR and CCR? 8th November 2007 at 08:15 #34943 danaGuest dear, CSSR is call setup success rate, but i don’t know the another.. regards 8th November 2007 at 11:55 #34944 VKGuest CCR is nothing but Call Completion Ratio. Author Posts Viewing 3 posts - 1 through 3 (of 3 total) The forum ‘Telecom Design’ is closed to new topics and replies.