anchor.diff:  
   %% ===========================================================================
   %% diameter callbacks
  -
  -%% peer_up/3
  -
  -peer_up(_SvcName, _Peer, State) ->
  -    State.
  -
  -%% peer_down/3
  -
  -peer_down(_SvcName, _Peer, State) ->
  -    State.
   
   %% pick_peer/4
   
  
positive.code:               {'Origin-Host',  OH},
                {'Origin-Realm', OR}]).
  
  %% prepare_retransmit/3
  
  prepare_retransmit(Pkt, ?CLIENT, _Peer) ->
      {send, Pkt}.
  
  %% handle_answer/4
  
  handle_answer(Pkt, _Req, ?CLIENT, _Peer) ->
      #diameter_packet{msg = Rec, errors = []} = Pkt,
      Rec.
  
  %% handle_error/4
  
  handle_error(Reason, _Req, ?CLIENT, _Peer) ->
      {error, Reason}.
  
  %% handle_request/3
  
  
negative.code:          {'Acct-Application-Id', [Dict:id()]},
           {application, [{alias, ?APP_ALIAS},
                          {dictionary, Dict},
                          {module, #diameter_callback
                                    {peer_up = false,
                                     peer_down = false,
                                     handle_error = false,
                                     prepare_retransmit = false,
                                     default = ?MODULE}},
                          {answer_errors, callback}]}]).
  
  -define(SUCCESS, 2001).
  