anchor.diff:      unregister(?REGNAME),
       ok.
   
  -
  +%% @doc
   %% Scenario tested:
   %% - client non-INVITE transaction is created (')
   %% - provisional response is received
  
positive.code:     unregister(?REGNAME),
      ok.
  
  %% Scenario tested:
  %% - client non-INVITE transaction is created
  %% - provisional response is received
  %% - provisional response is passed to TU
  %% - nothing happens in 32 seconds
  %% - transaction terminates due to the timeout
  client_timeout_proceeding(Transport)->
      register(?REGNAME, self()),
  
  
negative.code: %% - transaction retransmits ACK, but does not provide response to TU
  %% - 5xx response is received
  %% - transaction terminates
  %% @end
  client_invite_err(Transport)->
      register(?REGNAME, self()),
  
  