Can anyone tell me what an x25 line is please?

Answer 1

X.25 is an ITU-T standard protocol suite for wide area networks using the phone or ISDN system as the networking hardware. It defines standard physical layer, data link layer and network layers (layers 1 through 3) of the OSI model. Packet switched network was the common name given to the international collection of X.25 providers, typically the various national telephone companies. Their combined network had large global coverage during the 1980s and into the '90s, and it is still in use mainly in transaction systems.

Answer 2

X25 sockets provide an interface to the X.25 packet layer protocol. This allows applications to communicate over a public X.25 data network as standardised by International Telecommunication Union's recommendation X.25 (X.25 DTE-DCE mode). X25 sockets can also be used for communication without an intermediate X.25 network (X.25 DTE-DTE mode) as described in ISO-8208.

Answer 3

X.25 networks are still in use throughout the world, although in dramatic decline, being largely supplanted by newer layer 2 technologies such as frame relay, ISDN, ATM, ADSL, POS, and the ubiquitous layer 3 Internet Protocol. They remain some of the only available reliable links in many portions of the third world however, where access to a PDN may be the most reliable and low cost way to access the Internet. A variant called AX.25 is also used widely by amateur packet radio, though there has been some movement in recent years to replace it with TCP/IP. RACAL Paknet or Widanet as it is otherwise branded is still in operation in many regions of the world, running on an X.25 protocol base. Used as a secure wireless low rate data transfer platform, Paknet is commonly used for GPS Tracking and POS solutions currently

Answer 4

X.25 is an International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) protocol standard for WAN communications that defines how connections between user devices and network devices are established and maintained. X.25 is designed to operate effectively regardless of the type of systems connected to the network. It is typically used in the packet-switched networks (PSNs) of common carriers, such as the telephone companies. Subscribers are charged based on their use of the network. The development of the X.25 standard was initiated by the common carriers in the 1970s. At that time, there was a need for WAN protocols capable of providing connectivity across public data networks (PDNs). X.25 is now administered as an international standard by the ITU-T.

Answer 5

I dunno.