Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 1 | # |
| 2 | # CCITT X.25 Packet Layer |
| 3 | # |
| 4 | |
| 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). |
| 18 | |
| 19 | You can read more about X.25 at <http://www.sangoma.com/tutorials/x25/> and |
| 20 | <http://docwiki.cisco.com/wiki/X.25>. |
| 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>. |
| 24 | |
| 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). |
| 31 | |
| 32 | To compile this driver as a module, choose M here: the module |
| 33 | will be called x25. If unsure, say N. |
| 34 | |
| 35 | |