Nsu Chaining - Mitel 3300 ICP Technician's Handbook

3300 ICP Technician's Handbook – Release 3.2
BRI Connector Allocation
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NSU Chaining

NSU chaining refers to the physical connection of two NSUs
together, on one fiber interface, from the Controller. BRI NSUs may
not be chained.
To connect two NSUs to the Controller:
1. Connect the first NSU to the controller through a fiber
connection from the fiber port on the NSU to the fiber port on
the 3300 Controller.
2. Using a CAT5 crossover cable make a connection from CIM2
on the first NSU to CIM1 on the second NSU.
3. Connect power to the NSU.
Note: The first NSU must have the Message Link dip switch set
to 1, up. The second NSU must have the Message Link dip
switch set to 2, down.
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