Nortel Networks NN43001-563 User Manual
Page 151
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
•
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
.