The Modem Connect module implements one of the protocols in the Physical
    layer described by the Digital Network Architecture.

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

    The modem connect entity is the top-level entity in the hierarchy of
    entities belonging to the Modem Connect module.

                           Modem Connect
                      Line            Data Port