User's Manual
Table Of Contents
- Important Safety Instructions
- Overview
- The ERU assembly
- Do you have everything?
- Safety precautions
- Introduction
- Installing the ERU
- Installation overview
- Installation guidelines and requirements
- Estimating cable requirements
- Assembling the mounting bracket and pipe
- Installing the ERU on solid wood or lap siding
- Installing the ERU on brick or poured concrete
- Installing the ERU on a cinder-block or hollow wall
- Installing the ERU under the eaves
- Installing the ERU on a roof
- Attaching the ERU to the mounting assembly
- Routing and grounding the exterior cables
- Routing cable to the SOMAport
- Troubleshooting

20
External Radio Unit Installation Guide
Installation overview
Before you begin the installation, make sure you have the read the important
notice on page 3 and the safety instructions on page 7.
Installation tasks
To install the ERU, you must carry out the following tasks in the specified order:
Step See
1 Choose a site
page 21
2 Estimate cabling requirements
page 22
3 Assemble the mounting bracket and mounting pipe
page 24
4 Turn off the SOMAport
5 Install the ERU on one of the following surfaces:
External wall with a wood or lap siding surface
page 30
External wall with a brick or poured concrete surface
page 33
External hollow or cinder block wall
page 36
Under the eaves
page 38
Rooftop
page 41
6 Attach the ERU to the mounting pipe
page 44
7 Route and ground the exterior cables
page 46
8 Route the cable into the building and connect it to the
SOMAport
page 53