OSI/MHS Configuration and Management Manual

OSI/MHS Configuration and Management Manual—424827-003
Glossary-16
In X.400, an information object that consists of an envelope and its contents. The
envelope identifies the originator and the potential recipient of the message and
documents its path through the system.
message store. The part of an MHS subsystem that provides capabilities for message
storage.
message transfer agent. See MTA.
MHS (message handling system). A set of components providing for exchange of various
types of information, such as interoffice memoranda, among correspondents in a
network. An MHS consists of MTAs for message transfer, message stores for
message storage, and user agents to represent X.400 users.
MHS manager. The OSI/MHS manager process. The MHS manager runs as a NonStop
process pair. The process name is made up of a dollar sign ($) followed by one
alphabetic and up to three alphanumeric characters: for example, $ZMHS. See also
manager process.
MIB (management information base). A database used by the OSI manager to store and
retrieve configuration information and information about applications.
mnemonic O/R address. An O/R address that identifies a user by terms that are easily
remembered. See also numeric O/R address.
MON object. An object type, used in OSI/MHS management interfaces, that enables you to
address commands to the MHS manager. The MON object name identifies the MHS
manager.
MOTIS (Message-Oriented Text Interchange System). The ISO standard for message
handling systems, which is nearly the same as the CCITT X.400 standard.
MPDU (message protocol data unit). A user message, a probe, or a delivery report. An
MPDU can contain other, subordinate PDUs.
MR (message relay) class. The OSI/MHS CLASS object that identifies the set of all MR
groups in an OSI/MHS subsystem.
MR group. The OSI/MHS group that implements the message transfer function. The MR
group consists of three processes: MRP, RTS, and SC. There is one PDU store in
each MR group. Each OSI/MHS subsystem must contain at least one MR group.
MRP (message relay process). A process in the MR group that encodes and decodes
message headers, routes messages, schedules messages for delivery, and performs
other related functions.