Panasonic 1200N manual Rif, Risc, RM-Cell, Rom, Root Node

Glossary R

RIF

Rate Increase Factor: This controls the amount by which the cell transmission rate may increase upon receipt of an RM-cell. The additive increase rate AIR=PCR*RIF. RIF is a power of 2, ranging from 1/32768 to 1.

RISC

Reduced Instruction Set Computing: A computer processing technology in which a microprocessor understands a few simple instructions thereby providing fast, predictable instruction flow.

RM

Resource Management: Resource Management is the management of critical resources in an ATM network. Two critical resources are buffer space and trunk bandwidth. Provisioning may be used to allocate network resources in order to separate traffic flows according to service characteristics. VPCs play a key role in resource management. By reserving capacity on VPCs, the processing required to establish individual VCCs is reduced. Refer to RM-cell.

RM-Cell

Resource Management Cell: Information about the state of the net work like bandwidth availability, state of congestion, and impending congestion, is conveyed to the source through special control cells called Resource Management Cells (RM- cells).

RO

Read-Only: Attributes which are read-only can not be written by Network Management. Only the PNNI Protocol entity may change the value of a read-only attribute. Network Management entities are restricted to only reading such read- only attributes. Read-only attributes are typically for statistical information, including reporting result of actions taken by auto-configuration.

ROM

Read Only Memory: Computer memory which can only be read from.New data cannot be entered and the existing data is non-volatile.This means it stays there even when power is turned off.

Root Node

A node of a tree stucture that has no parent nodes.1

1.IBM Dictionary of Computing

Centillion 1200N ATM Switch User Manual	B-63
NTP 297-8103-903