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ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
6a2e9b73 SR |
2 | # |
3 | # CCITT X.25 Packet Layer | |
4 | # | |
5 | ||
6 | config X25 | |
70bd8f64 | 7 | tristate "CCITT X.25 Packet Layer" |
a7f7f624 | 8 | help |
6a2e9b73 SR |
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 | ||
535094a0 | 20 | You can read more about X.25 at <https://www.sangoma.com/tutorials/x25/> and |
706e282b | 21 | <http://docwiki.cisco.com/wiki/X.25>. |
6a2e9b73 | 22 | Information about X.25 for Linux is contained in the files |
c4ea03fd | 23 | <file:Documentation/networking/x25.rst> and |
883780af | 24 | <file:Documentation/networking/x25-iface.rst>. |
6a2e9b73 SR |
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. |