ations service provider or can be con- nected through the PBX on-site. On different telephone systems, different hardware is required to create analog telephone set ports. Considering application and telephone system type, it may be more economical to use sepa- rate outside lines. When purchasing a Fax-on-Demand system, here are some of the questions a knowledgeable vendor will ask you. Questions about your business: What is your business and what types of activities do you conduct? How many departments are there and how are faxes sent and received in each? In what instances do customers call asking the same ques- tions repeatedly? Do you have a separate customer service department? What type of telephone system do you have? Fax-on-Demand Specific Questions: How many documents are there to be retrieved? How frequently will they be retrieved? How time sensitive are they and how frequently do they need to be updated? 202 is The Telecom Handbook CHAPTER 9 Will your application be serving different time zones? What overall volume are you anticipating? Including: Number of pages stored Number of callers Number of simultaneous callers What capability for growth is anticipated? When you buy a Fax-on-Demand system, find out what the upgrade costs will be and how many fax ports can be added. It is also a good idea to check the quality of the documents generated by the system you are considering. Other capabilities of fax servers to look for when you are shopping for one include the following: Least cost routing (sending the call over the lowest cost out- side line). Client/server architecture, providing all processing at the server level, freeing individual workstations to work in other applications. Ability to interface with other applications you may be using. Flexible licensing arrangements as the number of users increases. More on Fax Servers In addition to the special applications described above, any organization may use a fax server for general receipt and deliv- ery of faxes, although most keep the more traditiona