Installation Methodology; Grounding Requirements - Motorola AP 7181 Installation Manual

4 AP 7181 Access Point: Installation Guide

2.3 Installation Methodology

Consideration of the order in which units are installed when deploying an AP 7181 wireless
network can work to ensure a more stable and functional network. The PTP backhaul layer
should be deployed first. Next deploy all nodes for the PMP Access Point distribution layer.
Next deploy Root nodes along with PMP Subscriber Modules (SMs) such that backhaul
and network connectivity can be verified or corrected. Finally, deploy all Mesh Point
wireless nodes in order of the least to most hops (1 hop nodes first, followed by 2 hop nodes,
etc.).

2.4 Grounding Requirements

To avoid damage to the equipment, become familiar with Motorola Policy R56 before
installing AP 7181 units. Refer to Standards and Guidelines For Communication Sites,
Version B. Both the hardcopy manual (Part Number 68P81089E50-B) and the CD version
(Part Number 9880384V83) can be ordered from Motorola.
Section 7.6.4 Broadband - Wireless Access Point Network from the Standards and
Guidelines For Communication Sites applies directly to AP 7181 deployments:
SPD (Surge Protection Device) considerations for broadband shall include the use of SPDs
to protect pole-mounted access points and ground-based cabinet architecture. It is
important to install proper SPD applications on both ends of Ethernet, Power-Over
Ethernet (POE), Giga-Ethernet (GigE) and AC cable runs. SPDs shall be located within
the node or cabinet, or as close to the entrance as possible, and properly installed into load
centers, control panels and utility power cabinets. While RF protection is a consideration,
it shall only be required when antennas are connected to the node with coaxial cables
greater than 610 mm (2 ft.) in length.
CAUTION
!
When grounding a unit installed on a wooden pole, a ground conductor and rod is required.
This requirement should be factored into the project deployment costs, particularly if the
equipment must be installed by a utility company.
It is required that all root and portal nodes be adequately
grounded. In addition, all root nodes and portals using the
Ethernet port or attached devices (e.g. a camera) must not only
be grounded, but they should also include surge suppression
for network reliability. This is particularly important for
network configurations with a public safety component.