The reason is so we can have a meaningful name for the cables. When I draw these, I make every effort to accurately show which ports on the switch the connections are made on, even though this rarely matters. (If we ever use a different topology I guess I'll have to think something else up.one of the problems to deal with when there's no real standard to go by.) The difference is topology: if a device is part of a DLR (Device Level Ring), then I fillet all the corners. In addition, you'll see that some of the corners on the Ethernet cables are right angles while some are radiused (filleted). The symbols are all scaled down by a ridiculous amount so everything fits on an 11x17 plot. As for those lines, they are all polylines, just a little extra insurance to keep ACADE from thinking they're wires and putting numbers on them. Whenever I can, I plot them out screened, so they appear grey, this is to help the lines depicting the Ethernet cables to pop out more.

These symbols are 'dumb' and aren't connected in any way to the schematics or the panel layout. See the attached image, it's a plot preview of one of my network drawings. I feel like this approach is best, considering the lack of any sort of established library for these and the fact that you never know who's going to be using that drawing in the future.that person might know nothing about networking. I use footprint symbols to create my network drawings.

Autocad electrical symbol