The Frame module provides framing functions for a communications link. It
    enables those who implement their own level 2 protocols to manage the links
    that use those protocols.

    You must install the product DEC WAN Device Drivers before you can refer to
    the Frame Module entities in an NCL command.

    The frame entity is the top-level entity in the hierarchy belonging to the
    Frame module. The entity provides framing functions for a communications
    link.  The entity does not provide any data link protocol capabilities, and
    is used by those who want or need to operate their own level 2 protocols.