Lucent Technologies Comcode 108678723 manual Pvc, QoS

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
Glossary and Abbreviations
	GL-5
PN
Port network

PNC

Port Network Connectivity—an alternative to either the direct-connect or center stage switch configurations for connecting the processor port network (PPN) to one or more expansion port networks (EPNs).

PPN

Processor port network

PRI

IDSN primary rate interface

PSTN

Public switched telephone network

PVC

Permanent Virtual Circuit—a virtual circuit that provides the equivalent of a dedicated private line service over a packet switching network between two DTEs (the path between users is fixed). A PVC uses a fixed logical channel to maintain a permanent association between the DTEs. Once a PVC is defined, it requires no set-up operation before data is sent and no disconnect operation after data is sent. ATM-CES uses PVCs as the basis for the permanent connections, sometimes called virtual trunking.

Q

QoS

Quality of Service

R

RDI

Remote defect indication

S

SDH

Synchronous Digital Heirarchy—Used outside the United States, it’s an ITU standard for transmission in synchronous optical networks.

SONET

Synchronous Optical NETwork—a family of optical transmission channels for speeds from about 45 Mbps to 2.4 Gbps and higher.

STM-1

Similar to OC-3 but used outside the United States.