Wireless WAN Systems
Most wireless WANs are cellular based, but some make use of space. Take a closer look at both of these.
Cellular-Based Wireless WANs
As shown in Figure 7-6, a cellular system consists of cell towers, concentrators, voice switches, and data gateways. The cell tower receives signals from user devices and transmits information back to the user. The voice switch connects the user device to another wireless, or wired, user through the telephone distribution system. This part of the system supports customary phones calls between users.
Figure 7-6. Cellular Systems Include Data Gateways to Augment Traditional Voice Services with Wireless Network Connections
The component that makes the system a wireless WAN is the data gateway. ...