User Manual

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4 Hardware Installation
4.3.7 Save all configuration data of the WIMAN radio mo-
dems at the radio tower
• Use the same name conventions used for the cables and
WIMAN radio modems.
• Record the following information with a terminal program:
-
Parameter („show“-command)
-
Statistics („stat“-command)
4.4 Grounding
It is extremely important to ground all installed devices on the
radio tower. This will reduce the amount of damage should
lightning strike. The following steps will also help to reduce
possible damage caused by lightning:
• Do not mount the WIMAN at the highest point of the radio
tower. This is the point most likely to be struck by light-
ning.
• Check that the outdoor housing and the tower standoffs
form a well-grounded metal-on-metal connection with the
tower frame.
• Avoid using rubber washers or seals.
• Install lightning protection devices between the data cable
and the hybrid-sets on both the top and bottom of the tower.
• Ground the data cable to the tower at (a minimum of) three
different places. (1) to the center of the tower, (2) to the
base of the tower where the cable bends (before the bridge
from the tower to the shed) and (3) before the cable runs
into the equipment shed. The best way to do this is to strip
away the outer casing of the cable and affix a grounding
clamp to the cable shielding, then connect this clamp to a
second one which is fixed to the tower.
• Make sure that all equipment (Switches, Routers, etc.) at the
base of the tower is properly grounded to the rack in which
it is mounted. Also make sure that the rack itself is properly
grounded.