Well, this is your first post here. That always raises some suspicion. Some spammers will post bogus messages, to get to the minimum post-count required to be able to post URLs.
Fore Systems' atm-switches were machines used in the cores of the biggest networks. Serious stuff. But that was 15-18 years ago. ATM in the Internet was killed by MPLS and PoS. ATM in telco-networks was killed by the Internet (and high-speed non-ATM interfaces, removing the need for small cells to reduce latency of voice).
Questions that are asked here are usually: "my WiFi is slow", "my Internetz stopped working" and "what kinda cable do I need". You're not gonna find many people here who know something about atm-switches. (There are a few people who know a lot about professional equipment, but those are firewalls, servers, etc. Not atm).
The last time I heard someone mention BootP was also 15 years ago. Or more.
You write that you just bought an ASX-1000. I could believe if someone had an ancient part of a network that they hadn't touched for 10 years, that had a Fore Switch in it. But to buy a new one ? Why ? Gigabit Ethernet stuff is dead cheap. And a lot faster than anything those old ATM switches can do. (Correct me if I'm wrong. I googled a bit, and mostly found linecards for T1/E1 and T3/E3 speeds). Sure, none of my business.
My apologies if you are serious.
I'm still a bit flabbergasted that you are serious. 🙂
But you should realize that very few people these days will know the answer to your questions. You'd be better off asking Ericsson. Sorry. Good luck.