Hello to you all... I am posting this question here because EE does not have a dedicated section for telephony questions. My question is in regard to the function of standard PBX systems. I have worked for companies where every cubical/office has a phone connected to the companies central PBX system. This office also has its own "phone number" where people (From outside the office) can call directly to. I have since switched jobs and work for an organization that uses older key systems ..etc with a receptionist (not automated) forwarding calls. I would like a Medium - High level explanation on how PBX's are able to have direct lines to people's desk with their own phone numbers.
Say you had 500 employees and 500 phones, if you wanted to have a setup for each employee to have their own outside phone number would you have to then have 500 lines which somehow forwarded by the PBX? This is not practical so I am assuming no. What is a good ratio to keep between outside lines available and actual phones?
thanks all for helping with my learning process!