Interphase Tech 5536 Network Card User Manual


 
Glossary
5536 PRI RAS Communications Controller Users Guide 217
X.21 bis (Packet data networking) International recommendation
that defines the most popular physical interface for X.25. Equivalent to
RS-232 and V.24.
X.21 (bis) link Commonly used in European countries, this is a pay
as you go link. When a signal is raised, the network automatically
establishes a link to the remote unit.
X.25 Packet switching protocol that lets computers communicate
via wide area packet switched data networks
XID See exchange identification.