since the discontinuation of the MET-ECOM, what product/s are you using as door phone integrated with AMX panels ?
Which is your reply to your clients when asking to speak and watch someone being on the house gate, from AMX panels ?
A lot of other systems are using DoorBird which has an open API but you’ll probably have to roll your own.
2n is by far the best intercom with API - you have to buy a licence to do the integration but its really cheap - about £30 ish. if you want it to work well, you need to run a SIP server but there are plenty of free ones around.
Works really well