Bukkit

Startup your server if you want to use the default settings skip the configuration section. Other wise configure the following:

manage-local: true    Should AMChat handle normal non radio chat?
chat-limited: true    Use range settings for non radio chat
radio-limited: true    Use range settings for radio chat

These are the main settings, manage-local will enable the chat-limited setting, this helps AMChat play nice with other plugins. chat-limited & radio-limited will enforce range rules on local chat (non radio) & radio chat.

/AM                       Display all your radio settings
/AM HOME       Reset your radio to the server default
/AM TUNE #    Change the Frequency you transmit on.
/AM CODE #    Change encryption code for transmissions, 0 disables encryption
/AM MIC           Toggles Microphone on/off
/AM RADIO        Toggles Radio on/off
/AM CUTOFF    Set receive cutoff range, you hear chat on neighboring frequencies
/AM FILTER                Toggles filter, if chat is encrypted and unreadable this will prevent it from being seen.
/AM PING player    Sends your radio settings to another player, radio range applies

Fixed Radio Towers

Fixed radios use /XM commands, to create a fixed radio you need to place a jukebox while in sneak mode (holding shift by default). You also have to be at sea level and below any height restrictions the admin has placed.

/XM    Show: Owned Radios, Favorites
/XM #    Join a favorite fixed radio (see below)
/XM INFO ID    Show info for an id, some info is restricted depending on the player
/XM LIST    List information on all radio towers on the server
/XM LINK ID PASS    Link to a radio that is in range, the password is only required once
/XM UNLINK    Break your current link to a radio
/XM SET OPT VAL
         freq or f <#>    Set the Frequency, server rules still apply
         code or c <#>    Set the encryption code used by the tower
         pass or p <pass>    Set the password to link, blank disables the requirement
         admin or a <name>    Toggle admin status for a player, they have to be online and linked
/XM FAV    Display a list of favorited fixed radio’s
/XM FAV ID    Toggle fixed radio’s favorite, use /xm # to join those radio’s
/XM CHOWN onlineplayer    Changes the ower of the currently linked tower, to an online player
/XM CHOWN offline offline    Same as above, but if the player is offline you have to type their name twice.

Permissions
amchat.radio.personal.*    All /am commands (except /am list)
amchat.radio.fixed.*    All /xm commands (except /xm list)
amchat.radio.override.*    Grants ability to override any restrictions for the radio
amchat.radio.list.*    Grants /am list & /xm list, these are really admin commands.