OSI/MHS Orientation Guide

X.400 Support on Compaq Integrity Systems
OSI/MHS Orientation Guide—424829-001
2-2
Case Study of Integrating X.400 on NonStop and
Integrity Series Systems
You integrate X.400 on the two types of systems by describing each system to the others
as an MTA. Conceptually, the configuration task on each type of system is the same,
although the interfaces for configuration might be quite different.
Case Study of Integrating X.400 on NonStop and
Integrity Series Systems
Figure 2-2 illustrates a hypothetical X.400 network including both NonStop systems and
Integrity Series systems. It is the network of a global news service, and its mission is to
carry news reports, including graphical information, to and from the national news
agencies of various countries. The network consists of the following major architectural
elements:
•
Satellite nodes, one or more in each client country. These Integrity Series systems
gather news information from sources in the country and disseminate reports from
the global news service to clients (such as national publications). Integrity Series
systems permit the use of UNIX applications for processing image and scientific
data and can easily disseminate information to clients equipped with UNIX
workstations.
•
One regional node in each country. These NonStop systems relay X.400 messages
to and from the satellite nodes. (Some large messages, such as those containing
compressed video, are transferred as FTAM files.) The regional nodes also perform
some local management functions, reflecting differences in infrastructure, tariffs,
and regulations across countries.
•
A messaging hub. This NonStop system relays X.400 messages among the regional
nodes and performs monitoring and management functions for the whole network.
To protect against a catastrophic failure (such as destruction of a building), the hub
has a backup system in which copies of vital data are maintained. In the event of a
catastrophic failure, predefined connections between the regional nodes and the
backup system would be activated and service quickly restored