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Chapter 2: Infrastructure Device Installation
Grounding Considerations
In order for a grounding system to be effective, a low impedance path to earth ground must be present.
The grounding system must have conductors of sufficient size to withstand the high fault currents that
must be shunted along this path. The lower the impedance the grounding system displays, the better its
capability to perform its task. The impedance requirement for a communications site is determined by
the classification of the site. Sites are broken down into 2 categories: Type A-Light Duty and Type B-
Light Industrial/Commercial. Type A-Light Duty sites have impedance requirements of 25 ohms or
less to ground whereas Type B- Light Industrial/Commercial sites have impedance requirements of
less than 5 ohms to ground. MOTOMESH 2.0 networks fall into the Type B-Light
Industrial/Commercial category, and therefore must be treated with greater considerations as far as
grounding requirements are concerned.
Since Type B grounding requirements stipulate 5 ohms or less impedance to earth ground, things such
as soil pH, type of grounding rods, size of conductors, and ground enhancing materials must be taken
into account to achieve this goal. To verify the impedance requirements are met, a special
Earth/Ground Resistance Tester (megohmmeter) may be necessary.
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Assembling the MOTOMESH Duo Device
Use the following procedure to assemble a MOTOMESH Duo Device.
Procedure 2-1 Assembling the MOTOMESH Duo Device
Place the brackets at the desired position on the pole.
1
Adjust the position of the box so that the antenna connecters are positioned vertically. Align the antennas
2
with the N-type connectors on the box and rotate to close.
Insert the cable into the external Ethernet port and tighten the connector to ensure a weatherproof seal.
3
Insert the Power Plug into the 4-pin connector.
4
Initial Infrastructure Device Configuration Information
Prior to attempting the configuration of a MOTOMESH Duo device, ensure that the device is powered
up and has connectivity to the MiSC.
Device Connectivity Testing
Only after a MiSC has been setup on the network, and an infrastructure device has been added using
the MeshManager, element management system software, that the procedure below can be used to
verify connectivity to a device.
Procedure 2-2 Testing Infrastructure Device Connectivity
Apply power to the device, the device should be operation in 60 to 120 seconds
1
2
Obtain the 802.11 MAC addresses for the device subcomponents that were recorded in the MAC Address
May 2007
If the MOTOMESH 2.0 product is attached to a light arm and the attachment point
meets the Type B grounding requirements, then the grounding stud attachment point is
not required to be used.
2-8
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