|Number of endpoints reserved for all packet network-related functions (conferencing, plays, etc.). This is an attribute that is derived from the type of hardware and the values of certain config parameters. Currently, its value is fixed after init-time. In the future, it's value might be impacted by configuration of online parameters. That is, its value might increase or decrease over time. For example, in a multi-card system, addition of a board would cause it to increase.