lo        no wireless extensions.

wlan0     IEEE 802.11g  ESSID:"xarxa-londis"  
          Mode:Managed  Frequency:2.467 GHz  Access Point: 00:11:95:94:8A:B0   
          Bit Rate=36 Mb/s   Tx-Power:20 dBm   Sensitivity=0/3  
          RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality:37/100  Signal level:-72 dBm  Noise level:-96 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0