anchor.diff:  %% Send an STR that the server ignores.
   send_noreply(Config) ->
       Req = ['STR', {'Termination-Cause', ?BAD_ANSWER}],
  -    {error, timeout} = call(Config, Req).
  +    {timeout, _} = call(Config, Req).
   
   %% Send an unsupported command and expect 3001.
   send_unsupported(Config) ->
  
positive.code: %% Timeout before the server manages an answer.
  send_timeout(Config) ->
      Req = ['RAR', {'Re-Auth-Request-Type', ?AUTHORIZE_ONLY}],
      {error, timeout} = call(Config, Req, [{timeout, 1000}]).
  
  %% Explicitly answer with an answer-message and ensure that we
  %% received the Session-Id.
  
negative.code: send_bad_answer(Config) ->
      Req = ['ACR', {'Accounting-Record-Type', ?EVENT_RECORD},
                    {'Accounting-Record-Number', 2}],
      {timeout, _} = call(Config, Req).
  
  %% Send an ACR that the server callback answers explicitly with a
  %% protocol error.
  