# Before You Power Up the System

Before powering up the system, make sure you complete the following tasks. See the appropriate chapters in this guide for information about these tasks.

| Warning: Be sure the power source is turned off and the system is turned off before you perform the installation tasks.

- Installing SRP I/O and SRP Modules
- Installing Line and I/O Modules
- Cabling the SRP I/O Module
- Cabling the Router for Power
- Cabling I/O Modules