http://www.ncs.gov/news/2008/100308.html

NCS serves as the coordinating Agency for Emergency Support Function-2
(ESF-2) Communications under the National Response Framework. Under
ESF-2, NCS, in conjunction with the Federal Emergency Management Agency
(FEMA), coordinates the restoration of critical communications
infrastructure and provides NS/EP communications to Federal, State,
local, and tribal governments. In addition, NCS also provides priority
communications services to key critical infrastructure personnel and
first responders.

As the operational arm of the NCS, the NCC is a unique joint government
and industry partnership that hosts a 24/7/365 watch operation. The NCC
Watch serves as the central coordination hub between Federal, State,
local, and tribal governments, and the Communications Information
Sharing and Analysis Center (Comm ISAC) during emergencies. The NCC
staff coordinates with 24 Federal Departments and Agencies (D/A) through
the Regional Response Coordination Centers, field offices, and OPs
centers to restore emergency communications to areas impacted by major
disasters. These D/A’s include FEMA, the General Services Administration
(GSA), the Federal Communications Commission (FCC), the National
Telecommunications and Information Administration (NTIA), and the
Department of Defense (DOD).