User's Manual

Table Of Contents
12 System Description
Chapter 1 - System Description
1.2.10.2 Outdoor GPS Receiver
The all-outdoor GPS Receiver is a pole mountable GPS receiver and antenna in a
single environmentally protected enclosure. The Outdoor GPS Receiver is powered
by a 12 VDC power source, supplied to it by the NPU via the GPS Adapter. The
RS-422 interface allows installation at distances up to 100m.
1.2.10.3 GPS Adapter Unit
The GPS Adapter connects the different GPS units to the NPU, adapting the
different interfaces. Future versions may include an internal GPS module that will
allow an all-in-one low-cost solution. A future optional addition of OCXO in the
GPS Adapter box may provide an improved hold over solution when the GPS is not
synchronized. The GPS Adapter is powered by 12 VDC supplied by the NPU. The
GPS Adapter is installed in a 1U high panel (the same panel that is used for the
ODU Power Feeders).
1.3 Networking Equipment
The Base Station is connected to the backbone through standard data
communication and telecommunication equipment. The NPU aggregates the
traffic from all AUs, connecting to the backbone through a 100/1000 Base-T port.
point-to-point link from the Base Station to the backbone can be either wired or
wireless.
1.4 Management Systems
The end-to-end IP-based architecture of the system enables full management of
all components, using standard management tools. An SNMP agent in the
NPU/Micro Base Station implements standard and proprietary MIBs for remote
setting of operational modes and parameters of the Base Station equipment as
well as the Subscriber Units served by it. Security features incorporated in
BreezeMAX units restrict the access for management purposes.
In addition, the Ethernet WAN can be used to connect to other Operation Support
Systems including servers, Customer Care systems and AAA (Authentication,
Authorization and Admission) tools.