IBM 990 - Manual (Page 270)

258 IBM ^ zSeries 990 Technical Guide
original equipment manufacturers information
(OEMI).
A reference to an IBM guideline for a
computer peripheral interface. More specifically, refers
to IBM S/360 and S/370 Channel to Control Unit
Original Equipment Manufacture’s Information. The
interfaces uses ESA/390 logical protocols over an I/O
interface that configures attached units in a multi-drop
bus environment.
parallel channel. A channel having a System/360™
and System/370™ channel-to-control-unit I/O interface
that uses bus and tag cables as a transmission
medium. Contrast with ESCON channel.
path group . The ESA/390 and z/Architecture term for
a set of channel paths that are defined to a controller
as being associated with a single S/390 image. The
channel paths are in a group state and are online to
the host.
path. In a channel or communication network, any
route between any two nodes. For ESCON or FICON,
this would be the route between the channel and the
control unit/device, or sometimes from the operating
system control block for the device and the device
itself.
path-group identifier . The ESA/390 term for the
identifier that uniquely identifies a given LPAR. The
path-group identifier is used in communication
between the system image program and a device. The
identifier associates the path-group with one or more
channel paths, thereby defining these paths to the
control unit as being associated with the same system
image.
PCICC. (IBM’s) PCI Cryptographic Coprocessor.
physical channel identifier (PCHID). A value
assigned to each physically installed and enabled
channel in the CPC that uniquely identifies that channel
to the system (for the IBM z990, the assigned PCHID
values are between 000 and 6FF).
port address. In an ESCON Director or a FICON
Director, an address used to specify port connectivity
parameters and to assign link addresses for attached
channels and control units. See also link address.
port card. In an ESCON or FICON environment, a
field-replaceable hardware component that provides
the optomechanical attachment method for jumper
cables and performs specific device-dependent logic
functions.
port name. In an ESCON Director or a FICON
Director, a user-defined symbolic name of 24
characters or less that identifies a particular port.
port . (1) An access point for data entry or exit. (2) A
receptacle on a device to which a cable for another
device is attached. See also duplex receptacle.
processor complex. A system configuration that
consists of all the machines required for operation, for
example, a Processor Unit, a processor controller, a
system display, a service support display, and a power
and coolant distribution unit.
program temporary fix (PTF). A temporary solution
or bypass of a problem diagnosed by IBM in a current
unaltered release of a program.
prohibited. In an ESCON Director or FICON Director,
the attribute that, when set, removes dynamic
connectivity capability. Contrast with allowed.
protocol. (1) A set of semantic and syntactic rules that
determines the behavior of functional units in achieving
communication. (2) In SNA, the meanings of and the
sequencing rules for requests and responses used for
managing the network, transferring data, and
synchronizing the states of network components. (3) A
specification for the format and relative timing of
information exchanged between communicating
parties.
PTF. See program temporary fix.
route. The path that an ESCON frame or FICON frame
(Fibre Channel frame) takes from a channel through an
ESCON Director or FICON Director to a control
unit/device.
saved configuration. In an ESCON or FICON
environment, a stored set of connectivity attributes
whose values determine a configuration that can be
used to replace all or part of the ESCON Director's or
FICON Director’s active configuration. Contrast with
active configuration.
SC Connector. An optical fibre cable duplex connector
that terminates both jumper cable fibres into one
housing and provides physical keying for attachment to
an LC duplex receptacle. For technical details, see the
NCITS - American National Standard for Information
Technology - Fibre Channel Standards document FC-PI.
Self-Timed Interconnect (STI). An interconnect path
cable that has one or more conductors that transit
information serially between two interconnected units
without requiring any clock signals to recover that data.
The interface performs clock recovery independently
on each serial data stream and uses information in the
data stream to determine character boundaries and
inter-conductor synchronization.
service element (SE). A dedicated service processing
unit used to service a S/390 machine (processor).