Cisco D9887B - Input;Output Slot Organization

Chapter 2 Controls and Configuration
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Input/Output Slot Organization
The D9887B receiver’s modular design allows many different input/output
configurations. An indexing system is used to identify module slots for
configuration and monitoring reference. The bottom row of slots is numbered 1-1
through 1-4 (left to right). The top row is numbered 2-1 through 2-4 as shown.