All Air devices that have a permanent power supply (not battery powered) can also be used as a router. This means that signals from devices with a poor connection to the Air Base Extension are amplified and therefore a greater range can be achieved.
Communication via routers to the Air Base Extension is slower than communication direct from an Air device to the Air Base. If an Air device is more than 2 routers away from the Air Base then we recommend an additional Air Base near the device with the poor signal. This is because the maximum number of hops (number of routers away from the extension). You can see the number of hops for a device in the Air monitor.
For the Air device to operate as a router you must tick the checkbox in the properties of the device. By default this is enabled on permanent power supply devices.
Why do you say it doesn't?