const client = new TelnyxRTC({
 login_token: jwt,
 debug: true,
 debugOutput: 'socket',
});

// Low-level: intercept raw WebSocket messages
const originalSend = client.connection.socket.send.bind(client.connection.socket);
client.connection.socket.send = function(data) {
 const parsed = JSON.parse(data);
 console.log('→ Server:', parsed.method);
 return originalSend(data);
};

// Recommended — high-level, stable
client.on('telnyx.notification', (notification) => {
 if (notification.type === 'callUpdate') {
 const call = notification.call;
 // Handle call state changes
 }
});

// Not recommended — low-level, may change
// (No public API for this — would require intercepting WebSocket)

// Listen via notification
client.on('telnyx.notification', (notification) => {
 if (notification.type === 'gatewayStateUpdate') {
 console.log('Gateway state:', notification.state);
 // 'up' = connected, 'down' = disconnected
 }
});