I do a combination of a spreadsheet and a diagram. The diagram is basically a map designed to show the coding/labelling scheme of the patch panels and ports. The Spreadsheet acts as a legend for the map so that it isn't cluttered with connecting lines. A tend to go PP-A-1 or SW-A-1 with PP designating patch panel and SW designating switch, the letter shows the position on the rack in sequence and the number is port number. You can also save Visio diagrams as JPEGs for portability just keep the original for editing purposes. Hi all; As a phone tech from last century I'd like to give my two cents worth on this. In the good old days we used to provide a double accounting approach, that is, each end point had the other end point noted. Neato Mediaface 5 Serial Number more.