NVision NV8288, Руководство пользователя

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20 Rev 1.3 • 21 Oct 08
2. Introduction
Frame Expansion
When two NV8288-Plus routers are connected together, the two monitor outputs from one router
are forwarded to the two monitor inputs on the second, connected router through monitor expansion
connections. This enables the monitoring of all outgoing signals from both routers through a single
set of monitoring connections.
For information on making monitor connections, see Making Monitor Connections on page 44.
Frame Expansion
Using the NV8288-Plus router, you can connect two router frames together to create a switching
matrix up to 576 inputs and 576 outputs. The two frames are linked by connecting several expan-
sion connections on one router to expansion connections on the second router.
The expansion connections are:
• I/O Signals — Each frame has 48 signal expansion connections. Connections are made between
the two routers. All 48 connections must be connected. See Signal Expansion Connections on
page 36.
• Control System — One router is connected directly to the router control system. Using control
system expansion connections, control system connections are also made between the two rout-
ers. This enables the control system to see both routers through one control system connection.
See
Control System Expansion Connections on page 40.
• Monitoring Equipment — One router is connected directly to the monitoring equipment. Using
monitor expansion connections, monitor connections are also made between the two routers.
This enables the monitoring equipment to see both routers through one monitor connection. See
Monitor Expansion Connections on page 45.
Each router must have two crosspoint cards installed. (See Crosspoint Cards on page 16.) When
two frames are connected together, the top crosspoint card on each router sends output signals to all
distributing I/O connections. The bottom crosspoint card on each router sends output signals to the
connected router (i.e., Router 1 sends signals to Router 2; Router 2 sends signals to Router 1). For
more information on how signals flow within and between connected routers, see
NV8288-Plus on
page 5.
Figure 2-19 shows the flow of signals between two connected routers. The signals are forwarded to
the connected router through the expansion output cards. For details on how the expansion output
cards manage inputs from the expansion connections, see
Standard on page 18.
Figure 2-19. Frame Expansion Diagram
Expansion
Cable
Connector
Router 1
Expansion
Cable
Connector
Router 2
x 6
Expansion
Output
Card
Router 1
Expansion
Output
Card
Router 2