​A voice agent that works in the browser can still fail the moment it meets a real phone line. Calls connect but nobody hears anything, outbound dials bounce at authentication, and numbers get flagged as spam before the agent says a word.

​In the second session of Murf Voice Circle's Masterclass series, Piyush Sahoo at Vobiz will follow a single phone call end to end, from the number that rings to the call record left behind.

​The session covers:

• ​The telephony stack: how carriers, the telephony layer and the agent platform fit together, and which layer to suspect first when something breaks

• ​Inbound and outbound calls: phone numbers, SIP trunks, the SIP handshake, and why signalling (SIP) and audio (RTP) fail in different ways

• ​SIP trunking vs WebSocket streaming: how each connects a call to your agent, and how to choose based on your stack, latency needs and control over barge-in

• ​Latency and audio quality: the network's share of a ~500 ms conversational turn, codecs, and cleaning audio before it reaches speech-to-text

• ​Live call control: voicemail detection, DTMF, recording, barge-in and warm transfers to a human

• ​Operating at scale: debugging with call detail records, number reputation and spam labels, and India-specific compliance such as DND, DLT and KYC

• ​A live call to a voice agent, and the most common ways telephony setups fail silently

​Key Takeaways

• ​A clear mental model of what happens on a phone call, from the first ring to the call record

• ​How to choose between SIP trunking and WebSocket streaming for your agent and stack

• ​A practical debugging order for telephony issues: signalling first, then media quality, then the model

• ​What it takes to keep numbers answerable at scale, including India-specific compliance

​Who Should Attend?

• ​AI and software developers looking to integrate voice capabilities into existing applications.

• ​Engineers and technical leads building, testing or scaling conversational AI systems.

• ​Founders and product teams exploring voice as an interface for AI-powered products.

​This is not a beginner-friendly session. Some familiarity with building AI-powered applications will help you get the most out of it.

​Murf Voice Circle

​Murf Voice Circle is where developers will come together to learn, exchange ideas and explore what's possible with voice AI.

​This series of Masterclasses is just the beginning. We're planning more sessions featuring practical insights, technical deep dives and conversations with people building in the space.

​Stay tuned. We're just getting started.