     J[heard] [<interface>]

     The jheard command will display a list of all the station callsigns
     that have been received as  sending packet  traffic on the channel,
     the time since  the station was heard last, and the total number of
     packets  received.  When  the command  is used  alone (no interface
     specified), the "heard" lists for all interfaces will be displayed.
     To display a list of  stations  heard on only a particular channel,
     specify the "<interface>" name along with the "jheard" command.

     Warning:  if this system has been on the air for very long, and the
     channels are very active, this list could be extremely long.

