Download Bull DPX/20 User`s guide

OTM
Open Terminal Manager.
Output
Window where the results of dialog commands are
displayed. The standard output of commands are
sent to this window (SMIT).
PAD
Packet Assembler Disassembler: Functional device
enabling un–equipped Data Terminal Equipments
to access a packet switching network.
PAVI
Videotex Access Point.
PCI
Protocol Control Information.
PDU
Protocol Data Unit: Unit of protocol control
information specified in the protocol of a given
layer.
PHY
Physical Layer Protocol.
PICS
Protocol Implementation Conformance Statement.
PMD
Physical layer Medium Dependent.
POWER
Performance Optimization With Enhanced Risc.
Presentation
Presentation protocol: Set of actions and resources
guaranteeing the presentation of the syntax of data
during their transfer.
PRI
Primary Rate Interface.
PSDN
Packet Switched Data Network.
PSE
Portable Stream Environment.
PSTN
Public Switched Telephone Network.
PVC
Permanent Virtual Circuit: A Virtual Circuit (X.25)
with a logical channel permanently assigned to it at
each Data Terminal Equipment. A call establishing
protocol is not required. Each PVC is identified
with a name using the following syntax:
<site name><line number><PVC number> Where:
Site name (4 characters) = identity of a unique
X.25 subscription (valid if PVC number _ 1).
Line number (2 characters) = 01 (with 1
subscription per adapter).
PVC number (2 characters) = number between 1
and 8.
QLLC
Qualified Logical Link Control: Data link control
protocol enabling SNA to SNA communications
over an X.25 network.
RAM
Random Access Memory: A storage device into
which data can be written and subsequently read.
RAS
Reliability, Availability, Serviceability.
RCB
Request Blocks.
RD
ReDirect (PDU).
Relay – NSAP address
NSAP address of an intermediate system.
Remote SNPA type
Remote Sub Network Point of Attachment.
RFC
Request For Comments.
RIB
Routing Information Base: Network directory
(library) which contains all the required routing
information to remote NSAPs. For each (group of)
NSAPs, it gives the remote SNPA and local
subnetwork to use. The SNPA is found by using
the Subnet table.
RIB, Static, “variable”
STATICV: the entry is part of the “variable” RIB on
disk loaded into CPU memory only on express
request of the internetwork protocol (CLNP). The
allocated CPU memory is called the “variable”
Static RIB.
RIB, Static, “fixed”
STATICF: the entry is part of the “fixed” RIB on disk
automatically loaded into CPU memory at the
initialization of the OSI stack. The allocated CPU
memory is called the “fixed” Static RIB.
Ring
Loop function which allows several predefined
values to be proposed in a parameter field (SMIT).
ROSE
Remote Operations Service Element.
RTS
Reliable Transfer System.
SCB
Session Control Block.
SCO
Santa Cruz Operations.
SCX
DPX/20 Communications System.
Glossary
G-5