OSI/MHS Configuration and Management Manual

OSI/MHS Configuration and Management Manual—424827-003
Glossary-17
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.
MTA object. An object type, used in OSI/MHS management interfaces, that defines
adjacent MTAs and their attributes to the OSI/MHS subsystem.
MTA process. See MRP.
MTS (message transfer system). The part of a message handling system that contains the
MTAs and that permits communication between user agents.
MTS identifier. A unique identifier that distinguishes a communication from all other
communications ever conveyed by the MTS within the MHS.
multithreaded process. A process that handles multiple requests simultaneously.
multivalued attribute. An attribute that can have more than one value.
network address. See NSAP and NSAP address.
Network Layer. Layer 3 in the OSI Reference Model. This layer routes data by
establishing, maintaining, and terminating communications between nodes. It sets up
the most economical path, both physical and logical, between communicating nodes;
routes messages through intervening nodes to their destinations; and controls the flow
of messages between nodes.
network service access point. See NSAP or NSAP address.