To find the steps necessary to place a conference call on your line, you will need to determine who is responsible for the analogue telephone line that you are using. Some lines will come directly from the Telephone Company and the service must be ordered through them. Other lines may come from a local PBX, which is controlled by your company's Telephone Administrator. If the service is available, there may be a key combination that is necessary to access the service. Your Phone Administrator should be able to assist you in determining the correct method to access the service on the line.