Nortel 1000 Fundamentals page 151

•
Then:
Using
92 means the users are very satisfied.
Scenario 2 A campus network has the following characteristics:
•
•
•
To calculate R = 94 - lc - ld - lp, use
(page
and
•
•
•
Then:
Using
85 means that the users are satisfied.
Scenario 3 A WAN has the following characteristics:
•
•
•
To calculate R = 94 - lc - ld - lp, use
(page
and
•
•
Copyright © 2007, Nortel Networks
.
0.5% packet loss: lp = 2
R = 94 - 0 - 0 - 2
R = 92
Table 33 "IP Trunk 3.01 (and later) QoS levels" (page
G.711 codec
50 msecs delay
1.0% packet loss
148), Table 30 "Impairment factors due to network delay" (page
Table 31 "Impairment factors due to packet loss" (page
G.711 codec: lc = 0
20 msec network delay: ld = 5
0.5% packet loss: lp = 4
R = 94 - 0 - 5 - 4
R = 85
Table 33 "IP Trunk 3.01 (and later) QoS levels" (page
G.729 codec
30 msec network delay
2% packet loss
148), Table 30 "Impairment factors due to network delay" (page
Table 31 "Impairment factors due to packet loss" (page
G.711 codec: lc = 11
20 msec network delay: ld = 5
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Measure intranet QoS 151
Table 29 "Impairment factors of codecs"
Table 29 "Impairment factors of codecs"
149), a value of
148),
148):
149), a value of
148),
148):