ath0      IEEE 802.11b  ESSID:""  Nickname:""
          Mode:Master  Channel:0  Access Point: Not-Associated
          Bit Rate:0 kb/s   Tx-Power:0 dBm   Sensitivity=1/1
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:off
          Link Quality=0/70  Signal level=-256 dBm  Noise level=-256 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0