I found one thread in the archives on this general subject, but it did not entirely answer what I need to know. I need to know what the difference is between a RJ-45 and RJ-48 connectors. In particular are there physical dimension differences in the two. I have seen both used to connect a T1 demarc to a CSU/DSU. But I have been told that the RJ-48 is slightly different than the RJ-45. As such the electrical contacts may not reliably match up and cause unexpected connection problems. So is there an actual physical difference in the two? If so, exactly what? _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]