Chapter 6 Deploying Wireless Networks for FortiOS 5.0 : Introduction to wireless networking : Wireless networking equipment : FortiWiFi units
  
FortiWiFi units
A FortiWiFi unit can:
Provide an access point for clients with wireless network cards. This is called Access Point mode, which is the default mode.
or
Connect the FortiWiFi unit to another wireless network. This is called Client mode. A FortiWiFi unit operating in client mode can only have one wireless interface.
or
Monitor access points within radio range. This is called Monitoring mode. You can designate the detected access points as Accepted or Rogue for tracking purposes. No access point or client operation is possible in this mode. But, you can enable monitoring as a background activity while the unit is in Access Point mode.
FortiWiFi unit capabilities differ by model as follows:
 
Table 40: FortiWiFi model capabilities
Model
Radio
Simultaneous SSIDs
20C
802.11 b/g/n 2.4GHz
802.11 a/n    5GHz
7 for AP, 1 for monitoring
30B
802.11 b/g 2.4GHz
7 for AP, 1 for monitoring
40C
802.11 b/g/n 2.4GHz
802.11 a/n    5GHz
7 for AP, 1 for monitoring
50B
802.11 b/g 2.4GHz
7 for AP, 1 for monitoring
60B
802.11 b/g 2.4GHz
802.11 a    5GHz
7 for AP, 1 for monitoring
60C
802.11 b/g/n 2.4GHz
802.11 a/n    5GHz
7 for AP, 1 for monitoring
80/81CM
802.11 b/g/n 2.4GHz
802.11 a/n    5GHz
7 for AP, 1 for monitoring