OSI/MHS SCF Reference Manual

Glossary
OSI /MHS SCF Reference Manual—424828-001
Glossary-14
MIB (management information base)
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.
MS (message store) class. The OSI/MHS CLASS object that identifies the set of all MS
groups in an OSI/MHS subsystem.
MS group. The OSI/MHS group that implements the message store-and-forward function.
The MS group consists of a single MS process, an MS SQL catalog, an MS SQL
database, and an MS PDU store. There can be zero, one, or more MS groups in a single
OSI/MHS subsystem.
MS process. A process in the MS group that provides mailbox management, access
management, submittal, delivery, retrieval, and recovery.
MS SQL catalog. An SQL catalog in which the MS, SAVEMBOX, and RESTMBOX
programs may be registered.
MS SQL database. The message store SQL database. Each MS group has one MS SQL
database.
MTA (Message Transfer Agent). The functional component that routes X.400 messages
through an X.400 network. MTAs work together to transfer messages and deliver them
to the intended recipient; there can be multiple MTAs on the path between any two
users. In OSI/MHS, multiple MR groups operate in parallel as a single logical MTA.