Figure 3-6: HSS Interconnection Unit
See Chapter 7 for further details about the use of HSS.
GSU
The GPS-based synchronization unit (GSU) is designed to handle inter-site interferences
under large-scale deployment scenarios.
The GSU is an outdoor unit consisting of a standard WinLink 1000 enclosure, a GPS antenna
and a PoE device.
The GSU is connected to the HSS Unit using a standard HSS cable. It synchronizes the trans-
mission timing of multiple Hub-Sites to the same clock source thus eliminating mutual inter-
ference (see Chapter 11).
Figure 3-7: General GSU configuration
See Chapter 8 for further details about the use of GSU.
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