2 # CCITT X.25 Packet Layer
6 tristate "CCITT X.25 Packet Layer (EXPERIMENTAL)"
7 depends on EXPERIMENTAL
8 depends on BKL # should be fixable
10 X.25 is a set of standardized network protocols, similar in scope to
11 frame relay; the one physical line from your box to the X.25 network
12 entry point can carry several logical point-to-point connections
13 (called "virtual circuits") to other computers connected to the X.25
14 network. Governments, banks, and other organizations tend to use it
15 to connect to each other or to form Wide Area Networks (WANs). Many
16 countries have public X.25 networks. X.25 consists of two
17 protocols: the higher level Packet Layer Protocol (PLP) (say Y here
18 if you want that) and the lower level data link layer protocol LAPB
19 (say Y to "LAPB Data Link Driver" below if you want that).
21 You can read more about X.25 at <http://www.sangoma.com/x25.htm> and
22 <http://www.cisco.com/univercd/cc/td/doc/product/software/ios11/cbook/cx25.htm>.
23 Information about X.25 for Linux is contained in the files
24 <file:Documentation/networking/x25.txt> and
25 <file:Documentation/networking/x25-iface.txt>.
27 One connects to an X.25 network either with a dedicated network card
28 using the X.21 protocol (not yet supported by Linux) or one can do
29 X.25 over a standard telephone line using an ordinary modem (say Y
30 to "X.25 async driver" below) or over Ethernet using an ordinary
31 Ethernet card and the LAPB over Ethernet (say Y to "LAPB Data Link
32 Driver" and "LAPB over Ethernet driver" below).
34 To compile this driver as a module, choose M here: the module
35 will be called x25. If unsure, say N.