Twilio Changelog

Twilio Voice Diagnostics Web App and the accompanying RTC Diagnostics SDK and Client JS SDK’s runPreflight API are now Generally Available.

The Voice Diagnostics Web App is a ReactJS application that tests audio devices, browser compatibility as well as network bandwidth and connectivity. It uses RTC Diagnostics SDK and Client JS SDK’s runPreflight API to perform the tests.

The RTC Diagnostics SDK provides functions to test input and output devices (microphone, speaker, camera) as well as the ability to confirm that a device's network satisfies the bandwidth requirements to make an optimal voice call.

The new runPreflight API places a loopback call which allows the Voice SDK to analyze network connectivity and audio quality. This method enables developers to build bespoke pre-call or troubleshooting workflows. For example, the API can be used to perform tests by placing and analyzing short duration calls. This API generates a report which includes network timing, jitter, MOS, latency, packet loss, the edge location that was used, as well as the same warnings that are logged to Voice Insights dashboard.

These tools provide developers the facilities to create a pre-call test page similar to Twilio's networktest tool, or embed it into their applications to determine voice calling readiness. Please see our example reference application.

Twilio has completed validation of the integration between Flex and Acqueon Engagement. The following features have been verified and are available for customers of Flex and Acqueon:

• Outbound Dialer with predictive, progressive, preview, and agentless dialing modes
• Contact Management and Segmentation - de-duplicate and scrub contacts to build the right campaign list
• Compliance Support - Do Not Call (DNC) numbers filtering and segmentation of contacts based on Prior Express Written Consent (PEWC). These tools let you conform with privacy regulations including TCPA, GDPR, CCPA, and Ofcom.
• Answering Machine Detection
• Campaign Optimization - contact selection strategies can leverage AI-predictions including Best Time To Call (BTTC), best channel to use, and propensity models
• Agent Blending - allows agents to seamlessly transition between inbound and outbound dialing

To learn more about Acqueon’s capabilities and how to enable it for your application, visit our integration documentation.

Twilio has completed validation of the integration between Flex and Calabrio ONE. The following features have been verified and are available for customers of Flex and Calabrio:

• Workforce Management
  • Historical data for forecasting
  • Agent schedule creation
  • Real-time adherence
• Quality Management
  • Recording and reporting
  • Quality evaluations
  • Screen recording
• Analytics
  • Speech, desktop, and text analytics

To learn more about Calabrio ONE’s capabilities and how to enable it for your application, visit our integration documentation.

The Programmable Video JavaScript SDK 2.8.0 enables Opus discontinuous transmission (DTX) by default for all audio tracks. Opus DTX significantly reduces the bandwidth used by an audio track when the participant is silent. It also reduces the CPU load on the subscriber side since there are fewer audio frames to decode.

Video applications typically have a small number of participants speaking and so the audio bandwidth consumed by silent participants is wasted. Although this feature will improve performance in all Video applications the impact will be most noticeable in larger multi-party Video Rooms.

For additional information and for details on disabling DTX, see the JavaScript SDK changelog.

In TaskRouter, timestamps for TaskQueueEnteredDate will now be updated following an intra-queue transfer. Previously, TaskQueueEnteredDate was only updated when a Task was transferred to a different TaskQueue.

To learn more about the TaskRouter Events resource, please refer to our documentation.

The Programmable Voice Call Events for individual calls can now be retrieved using a new Call Events REST API. Previously individual call events were only available via the Twilio Console. Using the new REST API you can programmatically retrieve the event logs of a specific call for further analysis or to populate your own dashboard.

Call Events can be used to programmatically analyze the result of the call, errors related to webhooks, TwiML returned by your application, as well as DTMF or speech input provided at various points during the call.

Please visit the API documentation page to learn more about using the API, and to access code samples in different languages.

In order to enhance security for all of our users, Twilio SendGrid now requires customers on free plans to use API Key authentication on all API requests and SMTP configurations. Customers must also enable Two-Factor Authentication (2FA) for all users. Visit our docs for more information on Upgrading to API Keys and Enabling Two-Factor Authentication.

We have updated all Flex projects that use Automatic Updates to Flex UI 1.23.

This release of Flex UI introduces usability improvements for the Conversation Screen. Now when users drill down to individual conversations they stay natively in the Flex UI. The former Conversation Screen is still available but will be deprecated.

Other notable changes:

The Teams View will now recover automatically from connection loss. Users will not need to refresh the page to recover their connection.

Several dependency packages have been upgraded to patch security vulnerabilities.

For a full Flex UI 1.23 changelog, visit the Flex UI release notes.

Reminder: You can pin to individual versions of the Flex UI or manage your Automatic Updates within the Flex Admin UI.

As of Dec 31st, 2020, Branded Calls will not be accepting new customers into the Private Beta program while we work with existing customers to refine the product based on their feedback and priorities. All current customers will continue to be supported. Stay tuned for the next Branded Calls update in Q1 2021.

Twilio launched Programmable Fax to allow developers to simply send and received faxes over the same reliable REST API you've come to expect.

Unfortunately, due to an influx of fraudulent traffic, we made the difficult decision to disable access to Programmable Fax for any new accounts and accounts that have not used it in the last 12 months.

Providing continued access to self-service onboarding presents support and security challenges for the Twilio team, preventing us from supporting current customers at the level they deserve. We recognize the challenges this decision might cause and will provide proactive communication as we work to improve the developer experience on Twilio.