What is the practical upper limit for the length of an ADSL?

The practical upper limit for the length of an ADSL (Asymmetric Digital Subscriber Line) connection is typically around 3 to 5 kilometers (approximately 1.9 to 3.1 miles) from the telephone exchange. Beyond this distance, the signal quality degrades significantly due to attenuation and noise, leading to lower speeds and unreliable service. Most providers recommend keeping connections within 2 kilometers to ensure optimal performance.