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caller-id

This feature enables the user to define which number on the Twilio account to use when dialing outbound using the dialpad.

flex-user-experience​

the vanilla feature without any further customizations will look like this

alt text

setup and dependencies​

Enabling the feature​

There are no additional dependencies for setup beyond ensuring the flag is enabled within the flex-config attributes.

There is an optional configuration property (include_outgoing_only_numbers) controlling whether or not outgoing-only caller IDs (i.e. verified non-Twilio phone numbers) are displayed in the dropdown. This is enabled by default, but can be disabled to hide these numbers.

"caller_id": {
    "enabled": true,
    "include_outgoing_only_numbers": false
}

Outbound Call Configuration​

The Flex Dialpad must be enabled in order to be able to place outbound calls from within Flex. If this has not yet been configured, you will not be able to use this feature. This can be enabled in the Twilio Console > Flex > Manage > Voice, or by using the Flex Configuration API:

POST https://flex-api.twilio.com/v1/Configuration
Authorization: Basic {base64-encoded Twilio Account SID : Auth Token}
Content-Type: application/json

{
  "account_sid": "Enter your Twilio Account SID here",
  "outbound_call_flows": {
    "default": {
      "workflow_sid": "WWxxxc",
      "enabled": true,
      "queue_sid": "WQxxx",
      "caller_id": "+1xxx",
      "location": "US"
    }
  },
}

how does it work?​

When enabled, this feature loads the phone numbers on the account using a serverless function, caches them locally, and preserves the selected value into the selectedCallerId worker attribute. When the StartOutboundCall action is invoked, we intercept the event before it is processed, and update the From number to use the selected value stored in the selectedCallerId worker attribute.