Xhub Controller - Theory Of Operation - Motorola DIMETRA MTS 2 Installation, Configuration And Basic Service Manual

XHUB Controller – Theory of Operation
XHUB Controller – Theory of Operation
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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:
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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.
The Site Controller door alarm configuration is also valid for the XHUB.
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Chapter 9: XHUB Controller
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6802800U74-N September 2009