Configure Vapi AI SIP Trunk

I need assistance with setting up a SIP trunk on Vapi AI.

Tasks include:
- Setting up a DID number
- Configuring outgoing call settings
- Testing incoming and outgoing calls

I will provide my own trunk user, password, and hostname.

Ideal skills and experience:
- Familiarity with Vapi AI
- Experience in SIP trunk setup
- Knowledge of DID numbers and call configuration
- Testing scenarios for VoIP systems