Hi guys ... I am consulting you with those who already had experience with the DSC 3125 Communicator I am updating my old and dear 3055i, to which only the VOICE messages were missing. Buy the 3125 and when I take the lid I get the surprise that only has three terminals that are used as Input and Output. With a post more I managed .. miserable, please .. The subject is that with the previous equipment could also activate the automatic gate .. looks like a pavada but it is fundamental if you need someone to enter your house without the keys. I'm screwed or is there any way to add some expansion ?. Thank you very much Hernan Rago Argentina