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The Data Over Cable Service Interface Specification (DOCSIS) defines functionality in cable modems that are involved in high-speed data distribution over cable television system networks. Using this feature, Multiple Systems Operators (MSOs) can provide a range of services(like broadband Internet connectivity, telephony) through an “always-on” Internet through Internet connection.

The primary function of the eRouter device is to allow subscribers to connect multiple CPE devices to the operator provided DOCSIS high-speed Internet service. DOCSIS specifications allow subscribers to directly connect multiple CPE devices to the cable modem; however, that requires operators to provide IP provisioning to each of the CPE devices. Depending on which IP Protocols are enabled, the eRouter allows provisioning of IPv4 CPEs, IPv6 CPEs, or Dual Stack (IPv4 and IPv6) CPEs simultaneously.

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