oK the answer to my own question is 1. Buy a number on dashboard.vapi.ai 2. That number will work for PSTN but also SIP as number@vapi.sip.twilio.com 3. Plug that SIP URI into your dialer and SIP INVITE us when a call is connected Is there going to be a way to avoid VAPI dialing a number, via BLocks or Squads one day?