Inbound or Blended services must have phone numbers associated with them for inbound voice traffic to be handled by the platform. These inbound Toll Free, Direct Dial, or Caller ID package phone numbers can also be configured for outbound Caller ID and Callback purposes. Callbacks to any phone numbers associated with an Inbound or Blended Service are handled and routed based on the Contact Flow and Message also assigned to the Inbound or Blended service.
For more information about associating an inbound service to a phone number, see Associate/Disassociate Services.