- ATC-U
- ADSL Tranciever Unit at the provider's central office.
- DMT
- Discreet Multi-Tone line code. This is the signalling method used by the various types of DSL.
- DSLAM
- Digital Subscriber Line Access Module. Also known as the ATC-U.
- POTS
- Plain Old Telephone Service. This is a standard telephone line. See also PSTN (Public Switched Telephone Network)
- Splitter
- A passive low pass filter designed to split the low frequency voice signal from the high frequency DSL signal.
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