Xhub Controller - Theory Of Operation - Motorola DIMETRA MTS 4 Installation, Configuration, And Service Manual

Applicant: Motorola Solutions
280 | XHUB Controller
XHUB Controller – Theory of Operation
Note: 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 TIB 3592 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.
Note: The Site Controller door alarm configuration is also valid for the XHUB.
Send Feedback | September 2014 | 6802800U74-AD
Equipment Type: ABZ89FC5827 / 109AB-5827
Exhibit D2