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ITG Engineering Guidelines Page 145 of
378
ITG Trunk 2.0 ISDN Signaling Link (ISL) Description, Installation and Operation
Packet
loss (%)
One-way
delay (ms)
QoS level
G.729A G.711A/G.711u G.723.1
4 400-440 fair fair poor
5 50-180 good good good
5 190-210 good good fair
5 220-360 fair fair fair
5 370-400 fair fair poor
6 50-200 good good fair
6 210-330 fair fair fair
6 340-380 fair fair poor
7 50-140 good good fair
7 150-310 fair fair fair
7 320-340 fair fair poor
8 50-290 fair fair fair
8 300-320 fair fair poor
9 50-270 fair fair fair
9 280-300 fair fair poor
10 50-260 fair fair fair
Table 24
ITG QoS levels (Part 3 of 4)
Note:
The QoS levels are equivalent to the following MOS values: (See page 56 for more details)
• excellent 5
•good 4
•fair 3
•poor 2