(RADSL) Rate Adaptive DSL: A modem technology (DSL) that maximizes the digital speed of copper lines and adjusts speeds in reference to signal quality.
(RBOC) Regional Bell Operating Company: The regional holding companies that resulted from the divestiture of A T& T. The previous 22 bell telephone companies were combined into 7 regional companies in 1984.
Regional Hubs: Fiber optic rings that link several adjacent or regional headends, thus improving reliability, lowering costs, and expanding cable’s offerings to include Internet access and telephone service.
Remote nodes: Generic term for equipment located outside the Central Office (CO) or the MTC (cable headend). Remotes nodes include DSLAMs, Fiber Mux/Multiplexer cabinets, communications hut/cabinet (cell sites).
Retransmission Consent: A policy enacted by Congress in 1992 requiring cable operators to secure the consent of local television stations before retransmitting their signals. Instead of retransmission consent, broadcasters may choose MUST CARRY.
(RF) Radio Frequency: The range on the electromagnetic frequencies with radio transmission.
(RJ-11 Jack) Registered Jack -11: The type of phone jack that local telephone companies wire for most residential homes and which can only hold one line.
Router: A device that forwards data packets of a specific protocol type from one logical network to another logical network, based on routing tables and routing protocols.
(RSVP) Resource Reservation Protocol: A network protocol that signals a router to reserve a resource along the data path for real-time transmission.
(RT) Ringback Tone: Also known as an audible ringing tone, it is the signal that the calling party hears during the ringing interval as an audio tone interrupted at a slow repetition rate.
(RTP) Real Time Protocol: An Internet protocol for the transmission of voice and video.