Glossary
object identifier. A value, distinguishable from all other such values, that is associated with an ISO information object. A standard representation of an object identifier is a set of numbers representing a directed path through a
object state. See state.
object state transition. See state transition.
octet. A byte of data; eight bits.
OctetString. The string type consisting of a string of octets. See octet.
open. An established line of communication between two processes. You can display the number of opens a process has by issuing the SCF STATUS PROCESS command.
open network. A communications network that is able to communicate between systems using standardized procedures and functions.
Open Systems Interconnection. See OSI.
operator message. A message, describing a significant event on a Compaq NonStop system, that is intended to be seen by an operator. An operator message is the
optional parameter. (1) In a protocol data unit (PDU), a parameter that is sometimes but not always present. (2) In the Compaq FTAM API, a
OSI (Open Systems Interconnection). A set of standards used for the interconnection of heterogeneous computer systems designed for universal connectivity.
OSI address. The address of an object on an OSI network. An OSI address consists of four components: the transport selector (TSEL), session selector (SSEL), presentation selector (PSEL), and network service access point (NSAP).
OSI/AS (Application Services). The Compaq implementation of the Session Layer, the Presentation Layer, and part (ACSE) of the Application Layer of the OSI Reference Model. The OSI/AS subsystem manages the communication of messages between a local Compaq system and a remote system on a network. This subsystem manages the
OSI manager process. A process in the OSI/AS subsystem that performs subsystem management functions. There is one OSI manager process per OSI/AS subsystem.
