PLANET VIP-350PT User Manual
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Packet Rate and VoIP Bandwidth Consumption
Packet rate is especially important for sizing a network against a router because routers are not only
constrained by bandwidth but the number of packets per second (PPS) that they can process.
This table calculates the bandwidth consumption based on uni-directional voice only. So for the total
bandwidth used for media during a simple two-way call, you should multiply the value by two.
Link
CODEC
Frame per
RTP Packet
(Packet Rate)
IP
(kbps)
PPP
(kbps)
Ethernet
802.3
Averaged
Band-width
Utilization
Delay
(ms)
Mean
Opinion
Score
(MOS
i
)
1 (35 pps
ii
) 16.8 18.4 21.6
28%
37.5
2 (17 pps)
11.2
12
13.6
43.2%
67.5
3 (12 pps)
9.3
9.9
10.9
52.8%
97.5
4 (9 pps)
8.4
8.8
9.6
59.3%
127.5
5 (7 pps)
7.8
8.2
8.8
64.1%
157.5
G.723.1
5.3 kbps
6 (6 pps)
7.5
7.7
8.3
67.7%
187.5
3.5-3.7
1 (35 pps)
17.9
19.5
22.7
31.9%
37.5
2 (17 pps)
12.3
13.1
14.7
47.9%
67.5
3 (12 pps)
10.5
11
12.1
57.1%
97.5
4 (9 pps)
9.5
9.9
10.7
63.8%
127.5
5 (7 pps)
9
9.3
9.9
68.1%
157.5
G.723.1
6.4 kbps
6 (6 pps)
8.6
8.9
9.4
71.4%
187.5
3.8-4.0
1 (100 pps)
42
46.8
56.4
16.5%
15
2 (50 pps)
25.2
27.6
32.4
28.2%
25
3 (35 pps)
19.6
21.2
24.4
36.8%
35
4 (25 pps)
16.8
18
20.4
43.5%
45
5 (20 pps)
15.1
16.1
18
48.8%
55
G.729ab
8 kbps
6 (17 pps)
14
14.8
16.4
53.1%
65
3.7-4.2
1 (100 pps)
64
73.6
75.2
43%
10
2 (50 pps)
48
52.8
53.6
60.2%
20
3 (35 pps)
44.8
48.2
48.7
66%
30
4 (25 pps)
40
42.4
42.8
75.1%
40
5 (20 pps)
38.4 40.3 40.6 79.11%
50
G.726
32 kbps
6 (17 pps)
38.1
39.7
40
80.3
60
4.1
1 (100 pps)
100.8
105.6
115.2
59.9%
10
2 (50 pps)
84
86.4
91.2
73.4%
20
3 (33 pps)
78.4
80
83.2
79.5%
30
4 (25 pps)
75.6
76.8
79.2
82.9%
40
5 (20 pps)
73.9
74.9
76.8
85.1%
50
G.711
64 kbps
6 (17 pps)
72.8
73.6
75.2
86.6%
60
4.3-4.7
Those values in
blue
font are near optimal settings for the specific CODEC in terms of bandwidth
consumption and delay. In general, the more frames carried in one RTP packet, the less bandwidth it
consumes but in the cost of longer delay. We suggest a good setting should not introduce a delay for
more than 60 ms.