A Note About Scratch Orgs
A scratch org is fully configurable, so developers can emulate different Salesforce editions with different features and preferences. You can share the scratch org configuration file with other team members so you all have the same basic org in which to do your development.
The scratch org definition file contains the configuration values that determine the shape of the scratch org. To enable Salesforce Voice Partner Telephony features in a scratch org, specify “ServiceCloudVoicePartnerTelephony” in the features field in your scratch org definition. Add a quantity value (between 1–50) when you add the ServiceCloudVoicePartnerTelephony scratch org feature. To learn more about all of the supported features, see Scratch Org Features.