Chapter 9: Xhub Controller; Xhub Controller - Theory Of Operation - Motorola MTS LiTE Installation, Configuration And Basic Service Manual

6802800U74-AN

Chapter 9: XHUB Controller

9.1
XHUB Controller – Theory of Operation
NOTICE: MTS 4 sites equipped with Site Controller Rev A or B may experience service
interruption to Base Radio(s) located in the Expansion Cabinet. Prior to Expansion Cabinet
installation, Site Controllers of Rev A or B must be sent to factory for FPGA upgrade or
replacement. Please see Motorola Solutions Technical Notifications (MTNs) for more
information.
The eXpansion HUB (XHUB Controller) is a non-intelligent switching and interface module which plugs
into the Site Controller slot of MTS 4 Expansion Cabinet. With the usage of an Expansion Cabinet and
an XHUB, a station can be increased by a number of four Base Radios. The XHUB receive the CP3
interface from the Site Controller in the Prime Cabinet, distribute the Enternet and timing as CP2 links
to the Base Radios in the Expansion Cabinet. The XHUB also have a door alarm input. The RFDS
alarms is reported through the CAN bus or the receivers. The XHUB has following modes of operation:
Normal mode: XHUB Controller in the MTS 4 Expansion Cabinet has an active connection with a
•
Site Controller in the MTS 4 Prime Cabinet. The XHUB may be used to extend the switching and
interface capabilities of the Site Controller.
Impaired Normal mode: If connection to the Site Controller of the MTS 4 Prime Cabinet is lost, the
•
XHUB Controller will go into Impaired Normal mode. It will return to Normal mode as soon as the
connection to the Site Controller is restored.
Standalone mode: If no connection to the Site Controller is present when the XHUB is turned ON
•
or being Reset, it will go into Standalone mode. In order to go to Normal mode, the XHUB Controller
needs to be Reset again.
NOTICE: The Site Controller door alarm configuration is also valid for the XHUB.
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