Some DSL Broadband definitions,
Often too many people get confused with all definitions, here we have explained in easy to understand terms.
ADSL: Asymmetric Digital Subscriber Line - asymmetric meaning it's faster downstream than upstream.
ASAM: Advanced Services Access Manager -Whether you have a DSLAM or ASAM in your exchange doesn't really matter. They do same thing. See DSLAM's as well.
ATM: Asynchronous Transfer Mode - a method of encapsulation which is capable of many virtual circuits. With these, providers (ISP's) can split an ATM connection (155Mbit or 622Mbit) up into many connections. ATM isn't just used for DSL but in case of DSL it's used to provision each customer.
Contention Ratios A contention ratio is number of users to xMbit of bandwidth. For example some providers offer 2Mbit DSL, with a ratio of 50:1, meaning 50 users to 1Mbit of bandwidth.
CPE Customer Premises Equipment, term that describes equipment used on customer end of a connection, for example your DSL modem/router, cable modem, black box on Wired Country etc.
DSL Digital Subscriber Line.
DSLAM Digital Subscriber Line Access Multiplexer - They are placed in DSL enabled Telecomm exchanges, when your modem syncs up and DSL light comes on, it means you are connected. When data travels down your connection, it goes from CPE -> DSLAM -> RAN -> ISP
ERX Edge Routing Exchange. See RAN.