Panasonic 15000 manual Vtds, Vuni, Wan, Wfq

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List of terms

VTDS

Voice transparent data service. See transparent data service (TDS) (page 136).

VUNI

See virtual interface (page 142).

waiting delay

The time a frame or cell waits in a transmission queue before it gets transmitted.

WAN

See wide area network (WAN) (page 148).

warm standby

Warm standby applications reduce service outages during an FP or CP switchover. During an equipment switchover, warm standby applications incur a longer outage of service than hot standby applications, but not as long as cold standby applications. As well, all connections must be reestablished.

WFQ

Weighted fair queuing. See weight limited FIFO algorithm (WLFA) (page 148).

weight limited FIFO algorithm (WLFA)

A Nortel Multiservice Switch system proprietary implementation of weighted fair queuing (WFQ), a non-shaping intra-class scheduler. WLFA is a mechanism for deciding which cells arriving at a Multiservice Switch node over individual circuits are delivered next to the common FIFO (first-in-first- out) trunk queue. WLF works by giving more common queue space to circuits that have a higher priority. The allocation of queue space effectively assures higher priority cells a greater share of trunk bandwidth.

weighted random early detection (WRED)

A mechanism for discarding packets based on a weighted random decision only after the node exceeds a minimum VC queue-length threshold. The node determines weights according to the extent to which the queue-length threshold is exceeded with respect to a defined maximum threshold. WRED is a method for early congestion detection, useful to window-based protocols (for example, TCP).

wide area network (WAN)

A network used for data communications among widely distributed geographic sites (bigger than a MAN). Technologies used include leased lines, connecting routers, multiplexers, packet switches, voice switches, and products such as Nortel Multiservice Switch nodes.

Nortel Multiservice Switch 7400/15000/20000

Terminology

NN10600-005 7.2S1 Standard

PCR7.2 and up March 2006

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