Paul, It depends on the standard you are using. 568a or 568 b. If you purchase connectors for a faceplate or box they will be labeled as such, or just a or b. The most common standard is 568b. Here is a link with the pin assignments for both. I hope this helps. http://www.computercablestore.com/568a_568b_color_codes.aspx -----Original Message----- From: Peter Shkabara Sent: Wednesday, November 13, 2013 7:52 AM To: [log in to unmask] Subject: Re: [PCBUILD] hard wiring issue If the wire pairs are not correct, you will have trouble - I learned it from experience! Here is a link to the proper pair assignment: http://www.groundcontrol.com/galileo/ch5-ethernet.htm Peter Shkabara -------------------------- [log in to unmask] -----Original Message----- From: Hachmeyer, Mr. Paul S. [mailto:[log in to unmask]] Sent: Tuesday, November 12, 2013 9:18 AM Subject: hard wiring issue I'm running about 75 feet of cat5 with a standard RJ45 termination block at each end. I'm using the straight-thru wiring, wh-gr, gr, wh-orange, blue, wh-blue, orange, wh-brown, brown on each box. Should I be reversing the colors on one end? I have both ends wired in the same sequence. When I plug in a laptop through the new cat5 with a patch cable at each end, I can't get an internet connection. I plug the laptop into the existing jack with either patch cable, works fine. I checked both patch cables with a cable tester, the tester also shows 4 good pairs. Kinda hard to test the 75' run after it's installed through the walls, etc. Paul Hachmeyer Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com Visit our website regularly for FAQs, articles, how-to's, tech tips and much more http://freepctech.com