NV8500 family Digital Routers • User’s Guide 11
1. Introduction
Signal Rates and Flow
slot 1 corresponds to local outputs 1–9 and forwards through the expansion connectors outputs
577–585 to the second router, and so on.
When two expandable router frames are connected one router is designated as Router 1 and the
other as Router 2. Each router manages inputs and outputs locally. In addition, each router forwards
inputs to the connected router and receives inputs from the connected router, effectively doubling
the total number of inputs and outputs. For example, when two NV8576-Plus routers are connected,
each router switches up to 576 inputs and 576 outputs locally. In addition, each router forwards 576
inputs to the connected router and receives 576 inputs from the connected router, for a total of 1152
inputs and 1152 outputs.
Because each signal must have a unique signal number, when two expandable router routers are
connected together, signals are numbered from 1 to the total of the two connected frames. For
example, the NV8576-Plus frame can switch 576 x 576. When two frames are connected the
switching matrix expands to a maximum of 1152 x 1152. The number for the two connected frames
is 1–1152, incorporating both routers instead of two routers both managing signals numbered 1–
576. For more information on signal numbering, see Slots and Corresponding Signal Numbers
on
page 8.
The number assigned to a signal depends from which router the signal originates. For example, if
using two NV8576-Plus frames, Router 1 has local inputs 1–576 and Router 2 has local inputs 577–
1152. Similarly, Router 1 has local outputs 1–576 and sends outputs 577–1152 to Router 2. Router
2 has local inputs 577–1152 and sends outputs 1–576 to Router 1.
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