1# 2# CCITT X.25 Packet Layer 3# 4 5config 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 36