31901: Stream - WebSocket - Connection Timeout

Twilio returns this error when the Media Stream connection request does not receive a response from your WebSocket server. Twilio uses the url in <Stream> to establish a secure wss connection, and your Media Streams application must allow secure WebSocket traffic on TCP port 443.

• Your WebSocket server is not connected to a network or is otherwise unreachable.
• The url in <Stream> points to the wrong host or IP address. Twilio uses that url to open the WebSocket connection.
• An intermediate service such as ngrok, a proxy, or another routing layer is not forwarding traffic to your WebSocket server.
• A firewall or network policy is blocking secure WebSocket traffic on TCP port 443.

• Confirm that your WebSocket server is online, connected to the network, and reachable from Twilio.
• Verify that the <Stream> url is correct and uses wss. wss is the only supported protocol for Media Streams.
• If you use ngrok, a proxy, or another intermediate service, verify that it routes traffic to your WebSocket server and returns a response.
• Update your firewall rules to allow secure WebSocket connections on TCP port 443 from Twilio to your WebSocket server.
• After you restore connectivity, confirm that your server receives Twilio's initial connected event on the WebSocket connection.

• Media Streams overview
• <Stream> TwiML reference
• Media Streams WebSocket messages