Daniel Cotts wrote: > > You are correct. the 568A or B spec shows that pin 1 is tip and > 2 is ring. > Pin 4 is ring and pin 5 is tip for pair one. So for a tip to > tip and ring to > ring crossover then 2 to 4 and 1 to 5 is correct.
Our copy of the 568 series TIA/EIA specs are out on a construction site at the moment. I'll be over there tomorrow so I'll take a look. You are exactly correct that the 568 series calls pin 1 a Tip, pin 2 a Ring, pin 5 a Tip, and pin 4 a Ring. So a 568 rollover is as you said. I don't know if the 568 series was ever intended to cover T1 though (it's common practice to use 568 patch cords for T1s these days, I'm just not clear that the spec was intended to encompass T1 stuff). I looked at ISOCs RJ-48C and RJ-48X, which apparently calls pin 1 a Ring, pin 2 a Tip, pin 4 a Ring, and pin 5 a Tip. The RJ spec is just a connector spec as far as I know. However, it was a connector spec geared specifically towards 1.544 T-carrier. Again, it doesn't matter technically, but it's nice to be precise wherever possible. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=61521&t=61487 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
