public void setDefaultPhoneNumber(String defaultPhoneNumber) {
        this.defaultPhoneNumber = defaultPhoneNumber;
    }
<p>
The default outbound calling number.
</p>

@param defaultPhoneNumber
       The default outbound calling number.
aws-java-sdk-chimesdkvoice/src/main/java/com/amazonaws/services/chimesdkvoice/model/Termination.java