Cisco Cisco 1900 2900 3900 Series 8-Port Gigabit Ethernet HS-WIC with PoE Installation Guide

This document describes the Cisco 3G Lightning Arrestor kit for use on Cisco wireless 3G devices and 
Cisco 4G wireless devices, and provides instructions for mounting the arrestor.

The Cisco 3G-ACC-LA provides a level of safety protection to the user as well as to wireless equipment 
by shunting to ground over-voltage transients induced into outdoor antennas and cables.  These 
transients, in mild cases can produce interfering signals in a wireless system, and in extreme cases, can 
be dangerous and destructive.

Overvoltage transients can be created through lightning static discharges, switch processes, direct 
contact with power lines, or through earth currents. The Cisco 3G-ACC-OUT-LA Lightning Arrestor 
limits the amplitude and duration of disturbing interference voltages and improves the overvoltage 
resistance of in-line equipment, systems, and components. A lightning arrestor installed according to 
these mounting instructions balances the voltage potential, thus providing safety and preventing 
inductive interference to parallel signal lines within the protected system.

The Cisco 3G-ACC-OUT-LA Lightning Arrestor is designed for use with Cisco 3G wireless devices and 
Cisco 4G wireless devices, and antennas and cables that use standard TNC connectors.

Do not work on the system or connect or disconnect cables during periods of lightning activity. 
Statement 1001

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the 
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection 
authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024