CATV cable is a shorthand term for cable television service. The cabling infrastructure that supports cable TV also supports cable internet. Many internet service providers (ISPs) offer customers cable internet service together with television and phone service over the same CATV cable lines.
CATV Cable Infrastructure
Cable providers operate directly or lease network capacity to support customers. CATV cable traffic typically runs over fiber optic cables on the provider’s end and over coaxial cables on the customer’s end.
DOCSIS
Most cable networks support the Data Over Cable Service Interface Specification (DOCSIS). DOCSIS defines how digital signaling over CATV cable lines works.
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