Introduction to Tandem X.25 Capabilities

Glossary
065307 Tandem Computers Incorporated Glossary–11
X.25. Set of international recommendations for the connection between computers,
terminals, or other devices and a public or private packet-switching network.
X.28. Standard related to X.25. Defines how an asynchronous device communicates
with a PAD in the same country.
X.29. Standard related to X.25. Defines how an X25 DTE controls the operation of a
PAD during communications with an asynchronous DTE.
X.75. Standard related to X.25. Defines how to connect public packet-switching data
networks through a gateway interface.
X.121. Standard address format for X.25 connection. It uniquely identifies a country or
geographical area, a network, and a subscriber. An X.121 address can contain up to 15
digits. See also DNIC.