Add AI voice agents to your Gradwell phone line using OpenAI. Self-host SIP4AI, configure your credentials, and let AI handle calls in minutes.
UK business VoIP provider with SIP trunking and hosted PBX solutions.
GPT-4o powered realtime conversations with advanced reasoning and function calling.
Download and install SIP4AI on your server or local machine.
# Install SIP4AI
curl -sSL https://sip4ai.com/install.sh | bashConfigure SIP trunk in the Gradwell portal. Supports both registration and IP auth.
# Set Gradwell credentials
export SIP_SERVER=gradwell.sip-provider.com
export SIP_USERNAME=your_username
export SIP_PASSWORD=your_passwordRequires OpenAI API key with Realtime API access.
# Set OpenAI API key
export OPENAI_API_KEY=your_api_keyRun SIP4AI with your Gradwell and OpenAI configuration.
# Start SIP4AI with openai provider
sip4ai --provider openai
# SIP4AI will register with Gradwell and wait for calls
INFO Registering with SIP server...
INFO Connected to OpenAI API
INFO Ready to handle callsGet started with SIP4AI today. Free for non-commercial use, affordable plans for businesses.