# Cabling Overview

Cabling an ERX router requires the following main tasks:

1. Familiarize yourself with the module ports, and ensure that you have the cables and wires needed to complete each cabling procedure. (See Figure 23.)
2. Read and understand all safety warnings. (See Installation Guidelines and Requirements.)
3. (Optional) Connect timing ports.
4. Connect the SRP I/O module to the network and to a management console.
5. Connect grounding wires to the router chassis.
6. Connect the power cables from the power source to the power input module.
7. Connect the line I/O modules to their appropriate network interface.

   | Note: We recommend that you use shielded cables where appropriate.

   Figure 23: ERX Ports and Connectors (ERX14xx Model Shown)