OSI/MHS Gateway Programmatic Interface (GPI) Programming Guide

Review of X.400 and OSI/MHS
OSI/MHS Gateway Programmatic Interface (GPI) Programming Guide—424822-001
C-4
X.400 Gateways
X.400 access allows proprietary systems to exchange messages with the global MHS
(Figure C-4). They can also exchange messages with other proprietary systems that
access the MHS.
An X.400 gateway performs two functions:
•
Translating messages
•
Transferring messages
The gateway provides the means to translate messages between proprietary format and a
functionally equivalent X.400 form. It also transfers messages between the proprietary
system and the X.400 MTA.
Figure C-4. X.400 Gateway
904CDT .CDD
Message Handling System
Message Transfer System
User User
MTA
OSI/
MHS
Gateway
Proprietary
Messaging
System
OSI/
MHS
NonStop System