Cerio OW-215N2-X User Manual page 36

 Group Key Update Period: This time interval for re-keying GTK
(broadcast/multicast encryption keys) in seconds. Enter the time-length required;
the default time is 600 seconds.
 Master Key Update Period: This time interval for re-keying GMK (master key
used internally to generate GTKs) in seconds. Enter the time-length required; the
default time is 83400 seconds.
 Key Type: Check on the respected button to enable either ASCII or HEX format
for the Pre-shared Key.
 Pre-Shared Key: Enter the information for pre-shared key; the format of the
information shall according to the key type selected. Pre-shared key can be either
entered as a 256-bit secret in 64 HEX digits format, or 8 to 63 ASCII characters.
WPA-Enterprise (or WPA2-Enterprise) General Setting

The RADIUS authentication and encryption will be both enabled if this selected.
General Setting :
 Cipher Suite: You can chose use AES or TKIP with your WPA / WPA2 encryption
method, AES is short for "Advanced Encryption Standard", The AES cipher is
specified as a number of repetitions of transformation rounds that convert the
input plaintext into the final output of ciphertext. Each round consists of several
processing steps, including one that depends on the encryption key. A set of
reverse rounds are applied to transform ciphertext back into the original plaintext
using the same encryption key.
CERIO software core : cen_v3.0