Methods, devices, and systems are provided for marking one or more entities of a call as internal/external such that certain call features can be invoked by servers and other devices residing behind a gateway. More specifically, entities of a call can be marked as internal/external based employing an assessment algorithm to determine whether the calling endpoint is an internal or external endpoint and/or whether a user of the calling or answering endpoint is an internal or external user. Once this determination is made, the call can be marked accordingly such that the appropriate features can be invoked.