The Communications Sector

Today’s global communications infrastructure is a sophisticated system of complex technologies
working together to deliver essential and innovative services to customers around the world. Modern
communications networks are the backbone to the Internet and other key information systems, and include
broad capabilities across wireline, wireless, satellite, cable and broadcasting infrastructure.

Communications is one of 16 critical infrastructure sector coordinating councils, and we work in
partnership to ensure that communications systems and networks are secure, resilient and
rapidly restored in the event of an incident.

BROADCASTING
WIRELESS
Broadcasting
There are more than 14,000 radio and 1,700 television broadcasting facilities in the United States, sending broadcasts through the air to a frequency network of transmitters.
Wireless
Wireless technology consists of cellular phone, paging, personal communications services, high-frequency radio, unlicensed wireless and other commercial and private radio services.



CABLE
WIRELINE
cable
The cable industry is composed of approximately 7,791 cable systems that offer analog and digital video programming services, digital telephone service, and high-speed Internet access service.
Wireline
Over 1,000 companies offer wireline, facilities-based communications services in the United States. Wireline companies serve as the backbone of the Internet.



SATELLITE
Satellite
Satellite communications systems deliver advanced data, voice, and video communications, transmitting data from one point on the Earth to another.