Nortel-networks NN43001-563 Bedienungsanleitung Seite 151

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Seitenansicht 150
Measure intranet QoS 151
QoS level
Network
delay (ms)
Packet
loss (%)
G.711
20
G.729A/AB
30
G.723.1 (6.3 Kbps)
30
149 2
fair
poor poor
149 4
fair
poor
not recommended
149 8 poor
not recommended not recommended
150 199 0
fair
poor poor
199 1
fair
poor
good
199 2
fair
poor
fair
199 4
poor
not recommended not recommended
199 8
not recommended not recommended not recommended
200 249 0
poor
not recommended not recommended
249 1 poor
not recommended not recommended
249 2 poor
not recommended not recommended
249 4
not recommended not recommended not recommended
249 8
not recommended not recommended not recommended
250 299 0 poor
not recommended not recommended
299 1
poor
not recommended not recommended
299 2 poor
not recommended not recommended
299 4
not recommended not recommended not recommended
299 8
not recommended not recommended not recommended
The QoS levels are equivalent to the following MOS values: See "E-Model" (page
73) for more details.
excellent 4.5
good 4
fair 3
poor 2
not recommended less than 2
Sample scenarios
Scenario 1 A local LAN has the following characteristics:
G.711 codec
20 msec network delay
0.5% packet loss
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
.
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