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X.25 describes a standard for an interface to packet switching networks.
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Operating Systems
OpenVMS Alpha Operating System V7.2-1 or later
DECnet-Plus V7.2-1 for OpenVMS Alpha or later (plus
ECO1 for XOT support)
Compaq TCP/IP Services for OpenVMS V5.0A or other
TCP/IP software (for XOT support)
Communications
PSDN
Data link protocol for Compaq's synchronous
communications options
Connects to other X.25 implementations using RFC 1613
(also known as XOT) via a TCP/IP wide area network
Process-to-process (X.25)
Process-to-terminal (X.29)
Terminal-to-process (X.29)
Licenses
DECnet-Plus - for CONS over LAPB, LLC2, GAP, or XOT.
CLNS over DEC HDLC
Compaq X.25 for OpenVMS Alpha - for all functions over
LAPB, LLC2, and XOT
DIGITAL X.25 Client for OpenVMS Alpha - for all
functions over LAPB and LLC2
Description
===========
X.25 for OpenVMS Alpha Systems enables appropriately configured systems to
connect to a X.25 Packet Switched Data Network (PSDN) via an X.25 Relay node
on the same Local Area Network (LAN). This is done via a DNA Phase IV X.25
connector node, or directly using a synchronous controller card. Packet
switching is a method of sending data across a network. In this method, data
is divided into blocks, called packets, which are then sent across a
network. Networks using this method are referred to as Packet Switching Data
Networks (PSDNs) or X.25 networks.
Features
========
Provides device drivers
Acts as a Gateway Access Protocol (GAP) server for Phase V GAP
Clients
Acts as an X.25 Connector system for DECnet-Plus X.25 Access
systems
Acts as a packet mode DTE connected to a supported PSDN
Acts as a packet mode DTE connected to a LAN
Acts as an X.25 Relay node conforming to ISO Technical Report
10029
Supports ISO 8208 DTE to DTE point to point operation
Provides an X.25 sub--network for DECnet-Plus CONS and CLNS
operation
Provide a DEC HDLC point to point data link for DECnet-Plus CLNS
operation
A combination of the above, chosen on a per DTE basis
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