Panasonic 1200N User Manual
Glossary
Q
Centillion 1200N ATM Switch User Manual
B-61
NTP 297-8103-903
PTSE
PNNI Topology State Element: A collection of PNNI information that is flooded
among all logical nodes within a peer group.
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.
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.
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.
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.
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.
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:
the following attributes of the end-to-end ATM connection:
•
Cell Loss Ratio
•
Cell Transfer Delay
•
Cell Delay Variation