Panasonic 1200N manual Ptse, Ptsp, Pvcc, Pvpc

Glossary Q

PTSE

PNNI Topology State Element: A collection of PNNI information that is flooded among all logical nodes within a peer group.

PTSP

PNNI Topology State Packet: A type of PNNI Routing packet that is used for flooding PTSEs among logical nodes within a peer group.

PVC

Permanent Virtual Circuit: This is a link with static route defined in advance, usually by manual setup.

PVCC

Permanent Virtual Channel Connection: A Virtual Channel Connection (VCC) is an ATM connection where switching is performed on the VPI/VCI fields of each cell. A Permanent VCC is one which is provisioned through some network management function and left up indefinitely.

PVPC

Permanent Virtual Path Connection: A Virtual Path Connection (VPC) is an ATM connection where switching is performed on the VPI field only of each cell. A Permanent VPC is one which is provisioned through some network management function and left up indefinitely.

Q

QD

Queuing Delay: Queuing delay refers to the delay imposed on a cell by its having to be buffered because of unavailability of resources to pass the cell onto the next network function or element. This buffering could be a result of oversubscription of a physical link, or due to a connection of higher priority or tighter service constraints getting the resource of the physical link.

QoS

Quality of Service: Quality of Service is defined on an end-to-end basis in terms of the following attributes of the end-to-end ATM connection:

•Cell Loss Ratio

•Cell Transfer Delay

•Cell Delay Variation

Centillion 1200N ATM Switch User Manual	B-61
NTP 297-8103-903