rers to design and build market specific products from building block designs. Complementing these trends, carriers, and service providers are adopting and adapting products to meet demands for service and facilities beyond traditional network boundaries. Many carriers offer managed services where the service provider designs a network, procures, installs, and then manages equipment and services on a life-cycle basis. This changing environment has led to approaches that include a mix of equipment and services designed to meet operational requirements of the business or organizational enter- prise. Many state governments have undertaken or plan to undertake outsourcing initiatives. 5 NETWORK ARCHITECTURE, FACILITIES, AND SERVICES CARRIER NETWORK OR ENTERPRISE NETWORK? Obviously if you're in the broadcast business, it's not likely you're a common carrier or, maybe stretching the point a bit further, you're not in the Internet service provider business either. However, that said, it doesn't mean you can't build the same type of network used by these types of business. Quite often the term carrier class network, or enterprises class network will be seen or used. Both terms are mostly marketing hype; however, there are ways to distinguish be- tween them. It's important to decide first of all what your require- ments are. In fact, in some content transport applications, neither class of network is satisfactory, and networks built to specific perfor- mance levels are required. Call it what you will-it's still a network, and it had better support or meet the business's needs or else the business may not be a business very long. FACILITY TYPES Three types of facilities may be used to make up a network. The simplest network is built using point-to-point private line facilities and premises based multiplex and switching equipment. The most complex networks are made from a combination of point-to-point private lines, premises based multiplex, and carrier provided switch- ing equipment. Essentially there are three types of fa