Building a programmable voice client with Python, PJSIP and VoIPstudio (Part 2)
- Tim Meredith
Table of contents
Connecting Python (PJSIP) to VoIPstudio in 30 minutes
This guide follows on from AI-powered voice assistant with Python, PJSIP and VoIPstudio (Part 1) and walks through the basic steps required to build a programmable SIP client using Python and connect it to VoIPstudio. Examples based on an open-source project developed by Luis Miguel.
Step 1: Create a VoIPstudio account
- Sign up for a free trial.
- Create a SIP extension.
- Note the following credentials:
- SIP Username
- SIP Password
- SIP Domain (e.g. sip.voipstudio.com)
These credentials will be used for registration.
Step 2: Clone the open-source client
Repository:
https://github.com/luismiguelbp/voip-client-python
Project: voip-client-python
Clone locally:
git clone https://github.com/luismiguelbp/voip-client-python.git
cd voip-client-python
This project already includes:
- SIP account registration logic
- Call initiation handling
- Media stream management
- Event callbacks
Step 4: Place an outbound call
Minimal example:
call = MyCall(account, pj.CallOpParam(True))
call.makeCall("sip:+441234567890@sip.voipstudio.com", pj.CallOpParam(True))
From here you can:
- Inject pre-recorded audio
- Generate speech dynamically
- Attach real-time AI logic
- Process inbound audio streams
Step 5: Extend with AI
You now have a programmable voice channel.
From this point you can integrate:
- Speech-to-text engines
- LLM-driven conversational models
- Custom escalation workflows
- Dynamic IVR trees
VoIPstudio handles:
- SIP transport
- Call routing
- PSTN connectivity
- Global number provisioning
You control the intelligence layer.
Deployment options
Because the client is standards-based SIP, it can run:
- On-premise (industrial environments)
- On a Linux server
- In a Docker container
- In a cloud VM
- Inside a larger automation platform
No proprietary telephony SDK is required.
Why this approach scales
Many AI voice platforms tightly couple intelligence and telephony.
This architecture separates them:
- AI can evolve independently.
- Telephony infrastructure remains stable.
- Developers maintain full protocol-level control.
For system integrators and infrastructure engineers, this reduces long-term lock-in risk.
Next steps
- Fork the repository.
- Connect it to your VoIPstudio trial.
- Build your first programmable voice workflow.
If you need SIP trunking at scale or global number provisioning, VoIPstudio provides the transport layer.
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