PDF of this tutorialRapid5 Networks performed a case study to test and analyze the economics of the various approaches within a representative carrier environment. This environment consisted of a LATA with over 1M lines and 23 central offices.
Figure 12. Offload Economics Case Study
The data in Figure 12 represents the costs of increasing PSTN capacity over a five-year period (2000–2005) and off-load savings from reduction in growth of PSTN equipment (Class-5 and tandem switches) and interoffice trunks but not including operational savings.
Referring to Figure 12, this data shows that continuing to support increasing data traffic without any type of off-load technology would require expenditures in excess of $12 million over the period for a single LATA. Simply implementing trunk-side off-load gains a reduction of over one-third. However, preswitch off-load and preswitch packetization have far greater impact, reducing costs by almost 80 percent. Furthermore, with the preswitch packetization approach, the fundamental infrastructure is already in place for next-generation convergence.
