Air America - radio network - ended in 2010.
I.E. America Radio Network ended in 2004.
Austereo Radio Network ended in 2011.
The Team - radio network - ended in 2002.
Enterprise Radio Network ended in 1981.
Pelmorex Radio Network ended in 1999.
Sports Fan Radio Network ended in 2001.
God's Country Radio Network ended in 2010.
University of the Air - CBC radio series - ended in 1965.
Air America - airline - ended in 1976.
They use a radio inside the device to communicate with a tower. That tower connects to the carrier's network, and from there is forwarded to another carrier's network. Basically the receiving end is the reverse of the sending.
Components of network device configurations How end systems are logically connected to a network How end systems are physically connected to a network
Components of network device configurations, How end systems are logically connected to a network, How end systems are physically connected to a network.