 Next-Generation SONET and Optical Architectures A = Total cost to support four broadband users in a building, with edge NE cost at $40,000: $9,124 Figure 4-8 B = Total cost with edge NE cost at $20,000: $8,568 Advantages of edge C = Total cost with edge NE cost at $40,000 and operations cost reduced to 50% of above: $8,274 D = Total cost with edge NE cost at $20,000 and operations cost reduced to 50% of above: $7,718 NE cost reduction versus operations (A) (B): -6.0% cost reduction. (A) (C): -9.3% (A) (D): -15.4% Total cost to support four broadband users in a building, with CPE cost at $40,000: $9,124 Four 10 Mbps Customers/Building $2,000 $1,500 $1,000 Total cost with CPE cost at $20,000: $8,568 Four 10 Mbps Customers/Building $2,000 $1,500 $1,000 these requirements. Next-generation SONET provides a viable option to serve all of these requirements. For carriers to justify connecting a building to the metro core network, they need a viable business case. A macro-level model of the viability of a sustainable ELEC (that is, a non-year-by-year venture-capitalist-fed ELEC registering hundreds of million-dollar losses per year) is simply as follows. Assuming a $100,000 fiber-installation investment to connect a building, a $50,000 in-building edge multiplexer investment, a 30-month payback tar- get,7 and three broadband customers in a building that the specific carrier in question can bring onboard, the minimum per-month charge per cus- tomer would have to be $1,666. This figure does not include the metro core Chapter 4 Total cost with CPE cost at $40,000 and operations cost reduced to 50% of above: $8,274 Figure 4-8 cont. Advantages of edge Four 10 Mbps Customers/Building NE cost reduction $2,000 versus operations $1,500 cost reduction. $1,000 Total cost with CPE cost at $20,000 and operations cost redu ced to 50% of above: $7,718 Four 10 Mbps Customers/Building $2,000 $1,500 $1,000 network, the central office/service node/points of presence (CO/SN/POP) equipment cost, the long-haul/Internet cost, the operations co