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Moore s Law, as it would apply to softswitch applications, has been exceeded by the growth in DS0 density in media gateways and the expansion in the number of Busy Hour Call Attemps (BHCAs). The count of DS0s per 7-foot rack has grown from 1,176 for a Netrix media gateway in 1998 to 108,864 for a Convergent Networks media gateway in 2001, marking a growth in capacity of 30 times per year. In addition, Dale W. Jorgenson of American Economic Review states that software investment is growing rapidly and is now much more important than investments in computer hardware. Given that the main cost of a softswitch solution is software, this is very true of softswitch. If these trends continue, it is wise to use two years as a life cycle for these projects.15 Annual benefit (BN) is calculated as the respective number of DS0s busy 8 hours per business day (8 60 480 minutes per business day) at 100 percent with 254 business days per year at $.03 per minute. Three cents per minute is chosen to reflect either a wholesale operation where a reseller has to remain competitive in the North American market, the customer is a large corporate user of long distance, or the market is very competitive. It should be noted that for the purposes of this net present value study the Class 4 and the softswitch deliver the same service with the same features at the same level of quality. The end users cannot discern if their call is routed via a softswitch solution or a Class 4. Net present value is either a positive or negative value. In the case of this analysis, the switch with the highest number is the most positive or best choice in delivering value for the investment. A high net present value means more wealth and higher returns to shareholders. It also assumes no constraint on financial capital. Thus, a firm has cash available to make transactions. No loans are required to finance transactions. Table 11-5 lists purchase installation costs for both Class 4 and softswitch. Installation figures are included because when a company leases equipment the cost of installation can be included in the lease, making it a business expense. Table 11-6 details the operating expenses of Class 4 and softswitch, which for income tax purposes translates into business expenses. Table 11-7 outlines the gross revenue for 480 DS0s, and Table 11-8 illustrates the cost structures when leasing Class 4 and softswitch for 480 DS0s.
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Jorgenson, Dale W. Information Technology and the U.S. Economy. American Economic Review, Vol. 91, 2001.
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Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
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Table 11-5 Purchase costs of Class 4 and softswitch for 480 DS0s
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Components of cost System Installation Total (P Co) Class 4 DMS-250 $638,000 $7,500 $645,500
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Softswitch NuTANDEM $200,000 $7,500 $207,500
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Table 11-6 Class 4 and softswitch business expenses for the project s lifetime at 480 DS0s
Component of Cost Collocation rent (annual) Labor Maintenance contract IP circuits Total For life (j) of 2 years
Class 4 DMS-250 $12,000 $85,000 (engineer) $55,000 $120,000 $272,000 $544,000
Softswitch NuTANDEM $12,000 $70,000 (technician) $20,000 $120,000 $222,000 $444,000
Table 11-7 Gross revenue for 480 DS0s
DS0s 480
Minutes/day 480
Price/minute .03
Days (2 yrs) 508
Total benefit $3,511,296
Table 11-8 Cost structures when leasing Class 4 and softswitch for 480 DS0s
Component of cost Collocation rent (annual) Labor Maintenance contract IP circuits Lease cost Total For life (j) of 2 years
Class 4 DMS-250 $12,000 $85,000 (engineer) $63,800 $120,000 $45,190 $325,950 $651,900
Softswitch NuTANDEM $12,000 $70,000 (technician) $20,000 $120,000 $14525 $236,525 $473,050
Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com) Copyright 2004 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use as given at the website.
Softswitch Economics
Softswitch Economics
Table 11-9 details the benefits and costs of Class 4 and softswitch for a configuration with 480 DS0s. Note that leasing is included as a business expense. The net present value is determined as follows: NPV (BN CN)(P/A, i, N) P where the opportunity cost of capital is 12 percent. Table 11-10 demonstrates how to determine NPV when leasing for Class 4 and softswitch. Table 11-11 shows the net present value when leasing at 12, 10, and 7 percent OCC for leasing 480 DS0s. Table 11-12 outlines the total costs and benefits when purchasing Class 4 or softswitch for 480 DS0s. Table 11-13 shows the salvage values for 480 Class 4 and softswitch DS0s. Table 11-9 Total benefits and costs of Class 4 and softswitch for 480 DS0s when leasing
Income tax component Gross income Business expenses (includes leasing costs) Taxable income Income tax as figured from federal income tax rates for corporation, 1994, Instructions for forms 1120 and 1120-A Profit after taxes and expenses
Class 4 $3,511,296 $651,900
Softswitch $3,511,296 $473,050
$2,889,246 $113,900 34% in excess over $335,000 $113,900 ($2,889,246 335,900)(.34) $982,038 $1,887,507
$3,038,246 $113,900 34% in excess over $335,000 $113,900 ($3,038,246 335,900) (.34) $1,032,697 $2,005,549
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