When using a Zoom modem for alarm dial-out, I am getting a SAPI Error: 0x8004530A when attempting to call out. I have downloaded the correct driver from Zoom, checked the registry settings, set my area code and run the diagnostics on the modem (every was normal). Any thoughts?

Solved - We had the modem installed on a rack mount server running Server 2019 with no sound card.

Thanks for updating this. We are glad you figured it out and have heard from a number of folks who learned this hard way.