User's Manual Chapter 2

Safety Guidelines Hardware Installation Guide
2-4 Airspan Networks Ltd. 02030311-06
2.2.2. Grounding
Only certain WipLL devices require additional grounding. WipLL devices that do
not require additional grounding have grounding at the main supply outlet. The
following table lists the WipLL devices’ grounding requirements.
Site WipLL device Grounding
BSR Through the mains (via BSDU)
BSDU Additional grounding required (grounding lug at
rear end of chassis)
Base Station
BSPS Additional grounding required (grounding lug at
rear end of chassis)
SPR Through the mains (via SDA) CPE
IDR Through the mains
2.3. Lightening Protection
WipLL devices comply to the Surge Immunity standard: EN 61000-4-5. WipLL
devices are protected from lightening surges as the outdoor devices (BSRs and
SPRs) are encased in a plastic chassis. Therefore, if lightening strikes the device, an
electrical circuit cannot be completed, and hence, no electrical surge can occur.
In addition, WipLL outdoor and indoor (SDA) devices provide high speed data line
protection against direct and induced transient over-voltages surges on the cables.
This capability is provided by the fact that all WipLL device are designed with TVS
(transient voltage suppressor) components that maintain potential differences.
However, for geographical areas that have above normal lightening activity, Airspan
can supply a surge protector composed of a 15-pin D-type adapter with a grounding
wire.