I do not know one thing really about telephones and lines. I want to learn though. Right now, our company contracts out with another company to come in and do our extension swaps and installation of new telephone ports, etc... We do a lot of office changes and phone switching and I'd like to learn how to do this myself so we don't have to keep paying someone to do this every time we want to change offices. There is a jack that we need to put a phone and extension in. I have the extension and it is not being used right now and I also have the phone, but where do I go to "install" this extension to that port? Is it incredibly hard to learn and not worth it to learn how to do it? We have traditional phones. They are not VOIP phones. They are standard "paired" RJ-11 phone cables and we use a Toshiba handset and base. When I look at our telecom closets and our DMARC room, I get a headache looking at all the wires involved with the phone system, but I'd like to understand how this all works. Any suggestions where to start? Or can someone tell me how to do these extension location moves? Thanks in advance.