ath0      IEEE 802.11g  ESSID:"FON_AP_BETE"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:18:84:A0:00:B6   
          Bit Rate:54 Mb/s   Tx-Power:18 dBm   Sensitivity=0/3  
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=77/94  Signal level=-18 dBm  Noise level=-95 dBm
          Rx invalid nwid:47234  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0