Labels:text | screenshot | yellow OCR: Projected Revenue for ISDN vs. DSL 35 (billions of dollars) 30 25 20 15 10 1997 1998 1999 2000 2001 2002 2003 Figure 1. This comparison of operator revenues for ISDN and Digital Subscriber Line (DSI:) technolo- gies depicts more consistent upward movement for DSL. Many factors, such as equipment costs, number of deployments, and maturity of the tech- nology, can affect operator revenues, as well as costs to operators and end users.
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