Hi Dana2, you have posted lots of questions on the VTO2000A ;-) You should have grouped them into one topic, much easier to answer.
As you have noticed, I got the accompagnied VTH1550CH, the CH version does have an "alarm output". I found on the net somewhere a tutorial on how to hook an old school mechanical chime bell to that. But as I don't have such a bell, I haven't implemented it.
On the VTO, there are some outputs too (to switch to relais), but not suitable for gongs.