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Twilio Voice Error 13237 encountered during SIP authentication.

Invalid 'SipAuthUsername' or 'SipAuthPassword'.

Understanding Twilio Voice

Twilio Voice is a powerful API that enables developers to integrate voice communication capabilities into their applications. It allows for the creation of voice calls, handling of incoming calls, and management of call flows, making it a versatile tool for building telephony solutions.

Identifying the Symptom

When working with Twilio Voice, you might encounter the error code 13237. This error typically manifests during the SIP authentication process, where the application fails to authenticate with the provided credentials.

Understanding Error 13237

Error 13237 indicates an issue with the SIP authentication credentials. Specifically, it suggests that either the SipAuthUsername or SipAuthPassword is incorrect. This error prevents successful authentication and, consequently, the establishment of a SIP call.

Common Causes

  • Typographical errors in the username or password.
  • Incorrect configuration of SIP credentials in the Twilio Console.
  • Changes in credentials that have not been updated in the application.

Steps to Resolve Error 13237

To resolve this error, follow these steps to verify and correct your SIP credentials:

Step 1: Verify SIP Credentials

Log in to your Twilio Console and navigate to the SIP Domains section. Ensure that the SipAuthUsername and SipAuthPassword are correctly configured. Double-check for any typographical errors.

Step 2: Update Application Configuration

Ensure that your application is using the correct SIP credentials. Update the configuration files or environment variables with the correct SipAuthUsername and SipAuthPassword as per the Twilio Console settings.

Step 3: Test the Configuration

After updating the credentials, test the SIP authentication process. You can use tools like Twilio's SIP Testing Tools to ensure that the authentication is successful and the error is resolved.

Conclusion

By carefully verifying and updating your SIP credentials, you can resolve Error 13237 and ensure smooth SIP authentication in your Twilio Voice application. For more detailed guidance, refer to the Twilio Voice Documentation.

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