# 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 an SRP Module or SFM Module
- Installing a Line Module or an IOA
- Cabling the SRP IOA
- Cabling IOAs
- Cabling the Router for Power