Interesting.

ESI's website makes it look like their current products are 100% IP. But sure enough Tadiran's website says they still sell Coral. It's definitely not front and center, but it's there.

But what the heck is going on with Vertical? On their products page they list 8x8, RingCentral, and Mitel products? What happened? I do see IP Wave mentioned. I haven't worked on a Wave since 2017, but it certainly supported Vertical, Vodavi, and Comdial phones. So assuming they are still selling digital cards for it I guess that's an option too.

NEC using Intermedia is kind of a shame. I worked for a partner and we had a big love/hate relationship with Intermedia.