2# CCITT X.25 Packet Layer
   5config X25
   6        tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)"
   7        depends on EXPERIMENTAL
   8        ---help---
   9          X.25 is a set of standardized network protocols, similar in scope to
  10          frame relay; the one physical line from your box to the X.25 network
  11          entry point can carry several logical point-to-point connections
  12          (called "virtual circuits") to other computers connected to the X.25
  13          network. Governments, banks, and other organizations tend to use it
  14          to connect to each other or to form Wide Area Networks (WANs). Many
  15          countries have public X.25 networks. X.25 consists of two
  16          protocols: the higher level Packet Layer Protocol (PLP) (say Y here
  17          if you want that) and the lower level data link layer protocol LAPB
  18          (say Y to "LAPB Data Link Driver" below if you want that).
  20          You can read more about X.25 at <> and
  21          <>.
  22          Information about X.25 for Linux is contained in the files
  23          <file:Documentation/networking/x25.txt> and
  24          <file:Documentation/networking/x25-iface.txt>.
  26          One connects to an X.25 network either with a dedicated network card
  27          using the X.21 protocol (not yet supported by Linux) or one can do
  28          X.25 over a standard telephone line using an ordinary modem (say Y
  29          to "X.25 async driver" below) or over Ethernet using an ordinary
  30          Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link
  31          Driver" and "LAPB over Ethernet driver" below).
  33          To compile this driver as a module, choose M here: the module
  34          will be called x25. If unsure, say N.
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