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  1 #
  2 # CCITT X.25 Packet Layer
  3 #
  5 config X25
  6         tristate "CCITT X.25 Packet Layer"
  7         ---help---
  8           X.25 is a set of standardized network protocols, similar in scope to
  9           frame relay; the one physical line from your box to the X.25 network
 10           entry point can carry several logical point-to-point connections
 11           (called "virtual circuits") to other computers connected to the X.25
 12           network. Governments, banks, and other organizations tend to use it
 13           to connect to each other or to form Wide Area Networks (WANs). Many
 14           countries have public X.25 networks. X.25 consists of two
 15           protocols: the higher level Packet Layer Protocol (PLP) (say Y here
 16           if you want that) and the lower level data link layer protocol LAPB
 17           (say Y to "LAPB Data Link Driver" below if you want that).
 19           You can read more about X.25 at <> and
 20           <>.
 21           Information about X.25 for Linux is contained in the files
 22           <file:Documentation/networking/x25.txt> and
 23           <file:Documentation/networking/x25-iface.txt>.
 25           One connects to an X.25 network either with a dedicated network card
 26           using the X.21 protocol (not yet supported by Linux) or one can do
 27           X.25 over a standard telephone line using an ordinary modem (say Y
 28           to "X.25 async driver" below) or over Ethernet using an ordinary
 29           Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link
 30           Driver" and "LAPB over Ethernet driver" below).
 32           To compile this driver as a module, choose M here: the module
 33           will be called x25. If unsure, say N.

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