A PBX or Business Phone System merely consolidates all your incoming lines into one control unit and provides more users to access this pool of phone fax list lines via phone extensions for each employee.A common interpretation for a phone line is that it is a line going into each phone. For example I just went in to meet an existing client who put in a request to "add fax list more phone lines".After checking the port capacity on the phone system I informed the client that they cannot add more phone lines."That is not true, we were told we could add up to 8 "phone lines" and currently we are having only 5 "phones" in all. We need two more "lines" added in this office fax list for new employees." The visibly annoyed client busted out. Notice how I have put quote around the words fax list I would like to highlight.In the telephony language, what the client actually needs is New Extensions , or new phone extensions, NOT lines or phone lines.We refer to lines as incoming lines from the telephone company. If you need more phones hooked up for the office, then you should be asking for more fax list extensions.Simply asking for "more lines for the office" would quite possibly lead to a misunderstanding, causing your PBX system provider or interconnect to get the phone company to add more lines for your office. Obviously this would increase your capacity to receive or make more calls outside and you fax list would be paying an increased monthly charge to your phone company. But if that's not your requirement, and you simply fax list need more phones for your new employees or you need to move your existing phone sets to new locations and need new wires pulled in, then you had better ask for "more extensions".I have personally been in situations when the customer has ordered "new lines" only to find out later that they fax list meant "new extensions". And it is an expensive mistake, because firstly you will pay your phone company to bring the new lines into your office, you will also pay your PBX or phone system provider to come in to hook up your "new" phone lines and then pay the PBX provider once again to remove fax list those "new lines" and install "new extensions" for additional phones in the office.