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Outbound Dialers with Service Cloud Voice for Partner Telephony
Preview (Push) Dialer
To use a preview dialer, create a preview dialer Lightning component and then use the startPreviewCall method in the Aura-based Toolkit API to initiate outbound calls. Calling this method ensures that the VoiceCall record has the CallType field set to Outbound and the CallOrigin field set to Preview. See the Sample Aura Component in GitHub.
Progressive Dialer
A progressive dialer works similarly to inbound calls. The vendor telephony system dials the customer without notifying the agent. After the customer picks up the call, the vendor follows the inbound call flow (that is, create a Voice Call, send CALL_STARTED, accept or decline).