Currently I get a DS3 (coax) handed to me and I mux it to T1's and plug it directly into my systems. There I can hold call conferences among other things.
My ISP is offering to bring me DS3's over IP for much cheaper. What I will need is a gateway that will do the IP-to-TDM conversion so I can keep everything the same with exception of the gateway of course. I'd like it to "input" IP via copper or fiber and "output" the same way my carrier currently does (coax).
I have been dealing with sales people for a week and no one can provide me an answer. AS5850 is EOL, AS5400 is EOL, etc...
Can someone give me a clue on where to start looking for such a product?