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# CCITT X.25 Packet Layer

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config X25

        tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)"

        depends on EXPERIMENTAL

        ---help---

          X.25 is a set of standardized network protocols, similar in scope to

          frame relay; the one physical line from your box to the X.25 network

          entry point can carry several logical point-to-point connections

          (called "virtual circuits") to other computers connected to the X.25

          network. Governments, banks, and other organizations tend to use it

          to connect to each other or to form Wide Area Networks (WANs). Many

          countries have public X.25 networks. X.25 consists of two

          protocols: the higher level Packet Layer Protocol (PLP) (say Y here

          if you want that) and the lower level data link layer protocol LAPB

          (say Y to "LAPB Data Link Driver" below if you want that).

          You can read more about X.25 at  and

          .

          Information about X.25 for Linux is contained in the files

           and

          .

          One connects to an X.25 network either with a dedicated network card

          using the X.21 protocol (not yet supported by Linux) or one can do

          X.25 over a standard telephone line using an ordinary modem (say Y

          to "X.25 async driver" below) or over Ethernet using an ordinary

          Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link

          Driver" and "LAPB over Ethernet driver" below).

          To compile this driver as a module, choose M here: the module

          will be called x25. If unsure, say N.