PAM Programming Manual

Glossary
PAM Programming Manual—142482
Glossary-5
octal
octal. A number system with 8-bit patterns represented by the symbols 0 through 7. Two
octal digits represent one 6-bit character, the standard for data representation prior to the
8-bit byte, which is represented by hexadecimal notation.
output destination. The destination to which the Subsystem Control Facility (SCF) directs
output. The destination can be a disk file, an application process, a terminal, or a printer.
The initial output destination is determined by the form of the RUN command used to
initiate SCF. The output destination can be changed dynamically during an SCF session.
port address. For PAM lines, the address used by PAM to specify the address of the
connection to a LAN adapter. For example, this is the protocol type for Ethernet-type
ports or SAP for LLC-type ports.
PORT object. Used to define an access point which provides access to a particular service.
PRIMARY. A sensitive SCF command that causes the backup CPU to become the primary
CPU and the primary CPU to become the backup CPU.
PROCESS object. The PAM manager process that receives all SPI requests from your
application or the PAM process itself.
PTrace (print trace). A Tandem utility that can be used to selectively format and display
trace data generated when the SCF TRACE command is issued. The data can be
interpreted and used for troubleshooting.
RESET parameter. In DSM, a parameter for the STATISTICS command. It resets the
statistical counters.
SAP. See service access point (SAP)
.
SCF. see Subsystem Control Facility
on page -7.
SCP. See Subsystem Control Point
on page -7.
SDU. See service data unit (SDU)
.
ServerNet LAN systems access (SLSA) subsystem. The software that allows the protocol
I/O processes (IOPs) and drivers to access the ServerNet adapters.
service access point (SAP). The access means by which a pair of communicating entities in
adjacent layers use or provide services. In OSI, a logical location between two layers,
through which the services of the lower layer are made available to local users, and
those of the upper layer are made available to remote systems. (The SAP is always
named after the lower layer; for instance, an SSAP is between the Session and
Presentation layers.) For the Network Layer and below, local users and remote systems
use the Network Service Access Point (NSAP) address to establish and maintain
connections. For the Transport Layer and above, local users and remote systems do not
use SAP addresses explicitly; rather, they specify an address called the “(N)-address,”
consisting of one or more selectors.