Quick question... is there a major difference (besides the connectors) between SC and ST MMF? Does one perform better than the other? Also, what's the difference between Duplex and Simplex and Riser/Plenum? I know what Plenum is used for as far as fire safety in the ceiling/walls. Any help would be cool. Cheers, Jeff ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]