Chapter 2 • Subsystems
1037852-0001 Revision A
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The QMPC resides on the NMSS server and has the ability of
supporting multiple transponders (up to eight outroutes).
CACTI Network Manager
CACTI Network Manager (new installations only) provides for
network monitoring, event logging, and graphing SNMP
statistics. Templates for network devices are included with this
feature.
Local area networks
The HX systems use LANs and VLANs to simplify connections
and reduce cable clutter. The following list indicates the functions
of the individual LANs/VLANs within the system.
• Gateway LAN
– Management VLAN
– Satellite or MUX VLAN
– Return channel VLAN
– Control processor (CP) VLAN
• Enterprise LAN/VLAN
Gateway LAN
The gateway LAN is used for internal communications and
consists of four VLANs.
Management VLAN The management LAN connects the network management
subsystem to other subsystems.
The management LAN carries all NOC administrative messages,
including managed NOC component software and configuration
information.
Satellite VLAN The satellite LAN connects the multicast broadcasters to the
multiplex (MUX) subsystem.
The satellite LAN carries outroute traffic destined for satellite
routers from the IP gateway, management gateway, dynamic
network control cluster (DNCC), timing unit, and conditional
access controller (CAC).
The satellite gateway receives the traffic on the satellite LAN and
sends it on the outroute. The satellite also sends flow control
information to all the IP gateways on the satellite LAN.
The satellite LAN is a dedicated LAN, which makes it easier to
troubleshoot in cases of packet loss.
Note: The nonredundant HX system configuration does not
contain a QMPC.
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