Ptp And Lightning Protection - Motorola PTP 500 Series User Manual

The cable used to connect the PIDU Plus to the users Network Equipment can be any
standard CAT5e Cable.
The PIDU Plus to ODU and the PIDU Plus to Network Equipment cables may be unscreened
(UTP) or screened (STP). However, unscreened cables reduce the system's ability to cope
with nearby lightning strikes. If lightning activity is common in the area of deployment, the use
of screened cable is highly recommended. See Section 5 "Lightning Protection".
The PIDU Plus provides screen continuity between the ODU and Network Equipment
connections.
NOTE
The ODU network connection implements automatic MDI/MDI-X sensing and pair
swapping allowing connection to networking equipment that require cross-over cables
(MDI-X networks) or straight-through cables (MDI Networks).

2.11 PTP and Lightning Protection

The PIDU Plus meets the low level static discharge specifications identified in Section 16
"PTP 500 Reference Information", but does not provide lightning or surge suppression.
The amount of lightning protection is dependent on regulatory requirements and the end user
requirements. The standard ODU for the PTP 500 Series Bridge is fitted with surge limiting
circuits and other features to minimize the risk of damage due to nearby lightning strikes.
These standard features may require some additional equipment to be configured as part of
the system installation to be fully effective.
A separate Ethernet surge suppressor must be used and appropriately earthed. Suitable
surge suppressors can be sourced from your Motorola Point-to-Point Distributor or Solutions
Provider. See Section 5 "Lightning Protection"
CAUTION
Motorola recommends the use of screened cable and Lightning Protection units to
protect connected equipment from nearby strikes.
The PTP 500 Series Bridge is not designed to survive direct lightning strikes. For this
reason the unit should not be installed as the highest point in a localized area, unless
specific precautions are taken. See Section 5 "Lightning Protection".
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2 Product Description