ADSL is therefore ideal for providing high-speed Internet access to homes and businesses where download speeds are more critical than upload speeds.ĪDSL uses frequency-division multiplexing (FDM) to separate voice and data into a baseband voice channel, upstream data channel, and downstream data channel. Over regular copper phone lines, ADSL can achieve upstream speeds of up to 1.5 Mbps and downstream speeds of up to 9 Mbps, usually in a 10:1 ratio. ADSL is asymmetric, meaning the upstream and downstream transmission rates are not equal. ADSL Bandwidth Allocation How ADSL work?ĪDSL is a form of Digital Subscriber Line ( DSL) that enhances the data-carrying capacity of the twisted-pair copper phone lines that join most homes and offices with their local telco’s switching facilities.A typical ADSL Configuration connecting HOME and TELCO CENTRAL OFFICE.
