Derived from Q.93B, the narrowband ISDN signaling protocol, an ITU standard
describing the signaling protocol to be used by switched virtual circuits on
QA (Quality Assurance)
- A planned and systematic pattern of all steps necessary to
ensure that a product conforms to established technical requirements.
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
QoSExp (QoS Expansion)
- Refers to specific forward and backward CDV, CLR, and forward CTD values that
may be assigned to a new signaling channel or SPVC PNNI connection.
QoSExt (QoS Extension)
- Refers to maximum CTD, CDV, and CLR values that may be assigned to individual
QoS Service types.
Queuing - Defines
how to organize buffered cells.