| Sam Ravnborg | 6a2e9b7 | 2005-07-11 21:13:56 -0700 | [diff] [blame] | 1 | # | 
 | 2 | # CCITT X.25 Packet Layer | 
 | 3 | # | 
 | 4 |  | 
 | 5 | config X25 | 
 | 6 | 	tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)" | 
 | 7 | 	depends on EXPERIMENTAL | 
| Sam Ravnborg | 6a2e9b7 | 2005-07-11 21:13:56 -0700 | [diff] [blame] | 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). | 
 | 19 |  | 
 | 20 | 	  You can read more about X.25 at <http://www.sangoma.com/x25.htm> and | 
 | 21 | 	  <http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm>. | 
 | 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>. | 
 | 25 |  | 
 | 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). | 
 | 32 |  | 
 | 33 | 	  To compile this driver as a module, choose M here: the module | 
 | 34 | 	  will be called x25. If unsure, say N. | 
 | 35 |  | 
 | 36 |  |