The X.25 Client module resides in the Application layer of the
    Digital Network Architecture. It interfaces with the X.25 Access
    module to establish communications with its X.25 Server system over
    a DNA Session Control connection using the GAP protocol.

    The X.25 Client Module contains no other Entities.

    The X25 CLIENT entity describes the X.25 client interface in an
    accessing system, through which X.25 clients gain access to a
    PSDN via an X.25 server in a gateway system.