Voice Codecs; Table 2-1 Ip Voice Call Data Rates; Table 2-2 Frame Relay Voice Call Data Rates - ND SatCom SKYWAN IDU 7000 Manual

General Carrier Design
Data and Voice Networking Overview

Voice Codecs

The following tables specify the required data rate per call and direction for both VoIP and
VoFR calls using the most popular voice codecs. For the user traffic estimation use the tables
below:
- For VoIP connections: use columns 'IP Bit rate w/o ROHC' or 'ROHC Bit rate' of table 2-1.
- For VoFR connections: use columns 'IDU Input Data Rate' of table 2-2.
The columns labelled 'incl. SLL encapsulation' provide an estimation for the data requirements
including SLL encapsulation.
Codec Codec
Bit Rate
[bps]
G.711 64,000
G.722 32,000
G.723 6,300
G.728 16,000
G.729 8,000
Table 2-1 IP Voice Call Data Rates
Codec
ACELP CN 8kx1
ACELP CN 8kx2
ACELP CN 8kx3
ACELP CN 6kx1
ACELP CN 6kx2
ACELP CN 6kx3
Table 2-2 Frame Relay Voice Call Data Rates
22
Voice Bit Rate
Payload Ethernet
[byte} [bps]
160 87,200
80 55,200
24 21,525
60 31,466
20 31,200
IDU Input Data Frame
Rate Time
[bps] [ms]
12,440 18
10,670 36
9,930 54
10,670 18
8,890 36
8,150 54
Network Design and Engineering Guide
IP Bit IP Bit
Rate w/o Rate
RoHC (incl. SLL
encaps.)
[bps]
[bps]
80,000 83,200
48,000 51,200
16,773 18,885
26,714 28,826
24,000 27,200
Voice Payload
[byte]
20
40
59
16
32
47
RoHC Bit RoHC Bit
Rate Rate
(incl. SLL
[bps]
encaps.)
[bps]
65,600 68,800
33,600 36,800
7,269 9,381
17,210 19,322
9,600 12,800
Data Rate (incl.
encaps.)
[bps]
15,120
12,000
10,820
13,340
10,230
9,040
2010-10-26