For the Event filters:Account Telephony Sessions Event/restapi/v1.0/account/{accountId}/telephony/sessions Enables notifications in case of a change of session information for any extension assigned to the current account.Extension Telephony Sessions Event/restapi/v1.0/account/{accountId}/extension/{extensionId}/telephony/sessions Enables notifications in case of change of session information of specified extension.

Add to the Notification Payload Structure the information of the originally dialed phone number not only the extension and also the given name of that phone number.