Digital Subscriber Line (DSL) is a system for providing relatively high data rate communications over conventional phone lines. This is the technology that many homes and businesses use to access the internet. It is available in most urban areas, but is generally not available in rural locations. The service is offered by most wire-line phone companies. Strengths: Reliable, Low cost, low power equipment and service, Relatively high data rate, No antennas, Secure. Limitations: Requires wire-line connection, Limited rural availability. Lifetime 5-10 years