| 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 | 
|  | 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 |  |