Cabletron Systems 1800 User Manual

Page 437

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Glossary

glo-11

X.21

is a CCITT recommendation that species the DTE/DCE interface for synchronous
operation on public data networks.

X.25

is a CCITT recommendation that specifies the DTE/DCE interface for “packet mode”
operation on public data networks.

X.3

is a CCITT recommendation that defines the service provided by an asynchronous
PAD to connect a character-mode terminal to an X.25 network.

XPAD

is an integral (to a SmartSwitch 1800) transparent SNA PAD. It can be used to
network any SNA device that can be networked using any of the other SNA PAD
types. It can be considered a fully transparent PAD for synchronous protocols;
however, it is not intended for this use, because special application programs would
have to be resident on the host.