SWAN Concentrator and WAN Subsystem Troubleshooting Guide

Glossary
SWAN Concentrator and WAN Subsystem Troubleshooting Guide—426992-008
Glossary-9
preferred path
preferred path. See path.
primary path. See path.
PROCESS object. A configurable object within the WAN subsystem SCF interface that
represents the ConMgr process, Simple Network Management Protocol (SNMP)
process, TFTP process, and WANBoot process.
processor. (1) The central processing unit (CPU). A processor reads program instructions,
moves data between processor memory and the ServerNet addressable controllers
(SACs), and performs arithmetic operations. (2) One or more computer chips, typically
mounted on a logic board, that are designed to perform data processing or to manage
a particular aspect of computer operations.
PROFILE object. A configurable object within the WAN subsystem SCF interface that
defines configuration modifiers that are used by the data communications subsystem
objects.
programmable read-only memory (PROM). Programmable memory data storage chips
that are read-only but that can be reprogrammed by a special device or by software.
protocol. A formal set of conventions governing the format and control of input and output
between two communicating devices. A protocol defines the rules by which devices
communicate including rules for both handshaking (or the exchange of predetermined
data between two modems) and line discipline (controlling messages sent over the
lines).
pSOS. An embedded kernel product of Integrated Systems, Inc., that is provided as part of
the WAN subsystem. It is the control program that resides on each communications
line interface processor (CLIP) on the SWAN concentrator.
random access memory (RAM). High-speed data storage chips used to implement main
memory on memory logic boards. RAM is volatile (that is, its contents are erased when
power is shut down). See also dynamic random memory (DRAM)
.
RFC. Request for Comment documents compiled by number by the Internet Engineering
Task Force (IETF) that define standards for intercommunication.
RS-232. An industry standard for serial data transmission. It describes pin assignments,
signal functions, and electrical characteristics. The current standard specifies a 25-pin
connector.
RS-449. An industry standard for serial data transmission. It specifies pin assignments,
signal functions, electrical characteristics, and a 37-pin connector with an optional
9-pin connector for a secondary channel.
SCF. See Subsystem Control Facility (SCF)
.
SCP. See Subsystem Control Point (SCP).