That explains the pricing. I've been looking for a cheap way to get a SIP/VOIP connection, so the kid and I can play with some old phones she's been gifted. I really want to make one or two of them work, so she can do internal calls at home, and maybe call grandmam.

It's easy enough to get a VOIP account with a local company, but the pricing is just insane. I really wish I could find an ATA solution that can do internal call and use a SIM to call out. They exist, but the prices rather high.