2.2.5.4. Required Bandwidth per Connection 
Note that the bandwidth calculation is based on 70 bytes of overhead:
RTP (12 bytes), UDP (8 bytes), IP (20 bytes), 802.1Q VLAN Tagging (4
Bytes), MAC (incl. Preamble, FCS, 26 Bytes).
IMPORTANT:
Bandwidth requirements assume Full Duplex
operation! When running Half Duplex, twice the bandwidth is required.
Bandwidth for active DMC master connections without SPE:
Table 5. Bandwidth for active DMC master connections without SPE
|
Codec
|
Sampling Time [ms]
|
Payload Frames per second
|
Payload [Bytes]
|
Total Bytes
|
Bandwidth [Bit/s]
|
|
G.711
|
10
|
100,00
|
80
|
150
|
120000
|
|
20
|
50,00
|
160
|
230
|
92000
|
|
|
30
|
33,33
|
240
|
310
|
82667
|
|
|
40
|
25,00
|
320
|
390
|
78000
|
|
|
G.729AB
|
20
|
50
|
20
|
90
|
36000
|
|
30
|
33,33
|
30
|
100
|
26667
|
|
|
40
|
25,00
|
40
|
110
|
22000
|
|
|
60
|
16,67
|
60
|
130
|
17333
|
|
|
G.723
|
30
|
33.33
|
24
|
94
|
25067
|
|
60
|
16,67
|
48
|
118
|
15733
|
|
Bandwidth for active DMC master connections with SPE:
Table 6. Bandwidth for active DMC master connections with SPE
|
Codec
|
Sampling Time [ms]
|
Payload Frames per second
|
Payload [Bytes]
|
Total Bytes
|
Bandwidth [Bit/s]
|
|
G.711
|
10
|
100,00
|
90
|
160
|
128000
|
|
20
|
50
|
170
|
240
|
96000
|
|
|
30
|
33,33
|
250
|
320
|
85333
|
|
|
40
|
25,00
|
330
|
400
|
80000
|
|
|
G.729AB
|
20
|
50
|
30
|
100
|
40000
|
|
30
|
33,33
|
40
|
110
|
29333
|
|
|
40
|
25,00
|
50
|
120
|
24000
|
|
|
60
|
16,67
|
70
|
140
|
18667
|
|
|
G.723
|
30
|
33.33
|
34
|
104
|
27733
|
|
60
|
16,67
|
58
|
128
|
17067
|
|
Bandwidth for master connections no longer used (without SPE):
Table 7. Bandwidth for master connections no longer used (without SPE)
|
Codec
|
Frame
|
Packets
|
Packet Size [Byte]
|
Bandwidth [kBit/s]
|
SID(1)
relative to Active
|
||
|
Length [Byte]
|
Length
|
Rate
|
Pure Data
|
Ethernet
|
Ethernet
|
Ethernet
|
|
|
G.711
|
1
|
1000 ms
|
1,00 /s
|
1
|
71
|
0,6
|
0,7%
|
|
G.729A
|
2
|
1000 ms
|
1,00 /s
|
2
|
72
|
0,6
|
1,6%
|
|
G.723
|
4
|
990 ms
|
1,01/s
|
4
|
74
|
0,6
|
2,4%
|
Bandwidth for master connections no longer used (with SPE):
Table 8. Bandwidth for master connections no longer used (with SPE)
|
Codec
|
Frame
|
Packets
|
Packet Size [Byte]
|
Bandwidth [kBit/s]
|
SID(2)
relative to Active
|
||
|
Length [Byte]
|
Length
|
Rate
|
Pure Data
|
Ethernet
|
Ethernet
|
Ethernet
|
|
|
G.711
|
1
|
1000 ms
|
1,00 /s
|
11
|
81
|
0,6
|
0,8%
|
|
G.729A
|
2
|
1000 ms
|
1,00 /s
|
12
|
82
|
0,7
|
1,6%
|
|
G.723
|
4
|
990 ms
|
1,01/s
|
14
|
84
|
0,7
|
2,4%
|
| (1) | rate between active master connections and master connections no longer used |
| (2) | rate between active master connections and master connections no longer used |