Telephony + realtime voice — answers inbound calls, streams audio and drives the agent. Without it, calls replay from demo data.

Phone numbers, SMS and call routing/transfer. Without it, numbers and transfers are simulated in demo mode.

The brain — understands the caller, follows the agent prompt and decides actions. Without it, the demo agent uses scripted transcripts.

Live availability + booking so the agent can put real appointments on the calendar. Without it, bookings are mocked.

Accounts, agents, call history & transcripts. Without it, auth runs in demo bypass and data is local.