44 Rev 2.2 • 27 Mar 10
1. Introduction
Active Cards
Visual Indicators
All output cards feature a circuit that performs status reporting and drives the card’s functions. Five
LEDs on the front of the input card indicate the card’s status: alarm (red), power good (green), soft-
ware is loaded (Amber), and the communication with the control card is good (green) or bad (red).
For more information, see Indicator LEDs
on page 101.
Monitor Cards
Depending on the router frame, up to 4 monitor cards (EM0663) can be installed. Each monitor
card produces 2 signals that can be sent to monitoring equipment for the purpose of assessing signal
presence and quality. The monitor card must have a corresponding monitor backplane that sends
the signals to the monitoring equipment. Each backplane has 4 connectors: 2 inputs and 2 outputs.
An operator can select any 4 signals (two inputs and two outputs) to monitor using UniConfig or
through the NV9000 router control system. When two expandable frames are connected, monitor
connections are cross-connected to allow the monitoring equipment access to all inputs or outputs.
Only one signal is sent from each input or output card to the monitor card for forwarding to moni-
toring equipment. This means that only one signal from each input card or output card is monitored
at any give time.
The NV8144 uses one monitor card, which receives signals from each of the 8 output cards. The
signals are then sent to monitoring equipment through connectors on a unique monitor backplane
(EM0714).
The NV8280/NV8280-Plus and NV8576/NV8576-Plus router frames have separate slots for moni-
tor cards monitoring inputs or outputs. The NV8280/NV8280-Plus router frame has slots for one of
each while the NV8576/NV8576-Plus router frame has slots for two of each. The input monitor
card and the output monitor card slots use the same monitor card (EM0663) and the signal process-
ing is the same for each. However, different backplanes are used to distribute input monitor signals
(EM0715) or output monitor signals (EM0714).
In the NV8280/NV8280-Plus, the input monitor card receives one signal from each of input card.
Similarly, an output monitor card receives one signal from each output card. The NV8576/
NV8576-Plus monitor cards work exactly the same way except that the monitor cards in the upper
portion of the router frame receive signals only from the output cards and input cards located in the
upper region. Likewise, the monitor cards in the lower region of the frame receive signals only
from the I/O cards installed in the lower region of the frame.
For connection information, see Making Monitor Connections
on page 77.
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