This definition appears somewhat frequently
See other definitions of MCC
Samples in periodicals archive:
As a result, Mercy now has a mobile communication center with satellite capability and satellite phones.
Nomad's lucrative new business model involved custom-building mobile communication centers for disaster response, emergency preparedness, law enforcement, or military applications.
In the Topanga fire, that was done with mobile communication centers that allowed fire units from several agencies to talk to each other.