ATU-C (ADSL Transmission Unit-Centralized)

An asymmetrical digital subscriber line (ADSL)

modem located at the telco central office (CO) or other headend location. The ATU-C is the line side interface of a digital subscriber line access multiplexer (DSLAM). A matching modem, known as an ADSL

transmission unit-remote (ATU-R) is located on the customer premises. See also ADSL, ATU-R, CO, DSLAM, headend, and modem.

• circuit switch
• circuit-switched data (CSD)
• circuit-switched network
• circuit terminating equipment
• Citizens Band (CB)
• cladding
• Clarke orbit
• Clarke, Sir Arthur C. (1917–)
• Class 1
• Class 1
• Class 2
• Class 2
• Class 3
• Class 4
• Class 4/5
• Class 5
• Class A ATM traffic
• Class A cable
• Class A IP address
• Class B ATM traffic
• Class B cable
• Class B IP address
• Class C ATM traffic
• Class C cable
• Class C IP address