Nortel 1000 Description, Installation And Operation Manual page 191

Networks communication server, ip trunk installation
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Figure 29
QoS level with G.711 codec
250
200
150
100
50
Excellent
0
0
0.5
QoS levels with G.711
Good
1
1.5
2
Packet Loss (%)
IP Trunk
ITG engineering guidelines
Fair
2.5
3
Description, Installation, and Operation
Page 191 of 644
Poor
3.5
4
4.5

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