Chapter 1 What’s New for FortiOS 5.2.1 : Wireless Networking : FortiAP Management : CLI Console Access
  
CLI Console Access
The CLI console on a FortiGate unit can now be used to connect directly to a managed FortiAP unit that has been configured to enable login-enable. To access the FortiAP, use the command execute telnet <ip>, using the IP address of the FortiAP.
 
Telnet must be used, as FortiAPs do not support SSH/HTTPS admin access.
The console can also now be accessed by going to WiFi Controller > Managed Access Points > Managed APs and selecting the option Connect to CLI. The console will appear in a pop-up window.
If login-enable is set to default or disable on the FortiAP unit, or the FortiAP is offline, this option will not appear.