Discusses Asymmetric Digital Subscriber Line (ADSL) that converts existing telephone lines into digital circuits which transmit data at 256Kbps to 7 Mbps. Describes ADSL, unique features of "Megabit Services" and initial deployment, costs, and impact on library services (extra bandwidth for Internet services, multimedia or other higher-bandwidth Internet services, and multiple Internet service providers to provide redundancy). (PEN)