Motorola sb6141 on Wikipedia

Read more information about Motorola SurfBoard Cable Modem products on Wikipedia. You can browse complete list of Motorola products, including Motorola SB6141.
http://en.wikipedia.org/wiki/List_of_Motorola_products

Cable Modem History on Wiki

A cable modem is a type of network bridge and modem that provides bi-directional data communication via radio frequency channels on a hybrid fibre-coaxial (HFC) and RFoG infrastructure. Cable modems are primarily used to deliver broadband Internet access in the form of cable Internet, taking advantage of the high bandwidth of a HFC and RFoG network.

Data Over Cable Service Interface Specification (DOCSIS) is an international telecommunications standard that permits the addition of high-speed data transfer to an existing cable TV (CATV) system. It is employed by many cable television operators to provide Internet access over their existing hybrid fiber-coaxial (HFC) infrastructure.
http://en.wikipedia.org/wiki/Cable_modem