Hughes HX System, System Overview

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Chapter 2 • Subsystems
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The Satellite LAN is also referred to as the Multicast or MUX
LAN.
Return Channel LAN The return channel LAN allows the DNCC to forward received
inroute packets to the IP gateways in the uplink subsystem. The
DNCC transmits these packets into the return channel LAN.
CP VLAN The CP LAN carries inroute control messages, such as burst time
plans, from the DNCC to the CDS (or the IFSS-TC). It also
carries user traffic from the CDS (or the IFSS-TC) to the DNCC.
Enterprise LAN/VLAN The enterprise LAN carries user and management traffic from the
IP gateways to the customer’s enterprise router or the internet.
The enterprise LANs connect an uplink subsystem to the
independent IP network accessible by terminals receiving the
subsystem's uplink in such a way that the traffic from one
independent IP network is accessible only by a terminal
authorized to access that network. The downlink subsystem also
requires access to these enterprise LANs so that it can forward
inroute packets to the associated equipment within the
appropriate uplink subsystem.
The enterprise LAN is also referred to as the INET LAN.