Bandwidth, Codecs and Compression
191
IP applications and compression
Most Mitel IP-based applications support compression. NuPoint does not support compression.
To get the best voice quality performance from devices such as Speak@Ease™ and IP voice
mail, allocate them in a common compression zone with other devices not running compression,
e.g. default zone 1.
Consider the effect of allocating them to a compression zone where an application is used as
a central resource over a WAN link. Bandwidth restrictions may still require compression to be
enabled.
TRUNKING GATEWAY WORKING EXAMPLE
In terms of considering network bandwidth, it should be based on the 120 channels and where
they are being connected. Also consider the maximum number of compression channels
(G.729a); they are limited to 64 within a single unit. Further IP trunks use standard
non-compressed G.711 channels. Thus, in the example of toll-bypass, it is likely that trunks will
go via the IP WAN. In this case, the connection bandwidth requirements will be 11.0 Mbps. For
a fully G.711 connection (no compression), then 16.0 Mbps is needed. Note that Ethernet and
WAN links should not be fully utilized, in order to allow maintenance traffic to flow. Typically, a
link is loaded to 70% on a WAN link and 80% on a full duplex LAN.
Table 58: Trunk Gateway Bandwidth Calculation with 64 Channels Compression
ADDITION (MIXED COMPRESSED AND
NON-COMPRESSED)
BANDWIDTH
64 channels of compression (40.8k each)
2.611 Mbps
56 channels of non-compression (120-64 = 56, 96.8k each)
5.402 Mbps
Signalling overhead 10% (on total of voice)
0.801 Mbps (10% of 5.402+2.611)
TOTAL (payload)
8.835 Mbps
TOTAL (connections with LAN loading 80%)
11.0 Mbps
Table 59: Trunk Gateway Bandwidth Calculation with 120 Channels Non-compression
ADDITION (NON-COMPRESSED)
BANDWIDTH
120 channels of non-compression (100k each)
11.62 Mbps
Signalling overhead 10%
1.16 Mbps (10% of 11.62)
TOTAL (payload)
12.78 Mbps
TOTAL (connections with LAN loading)
16.0 Mbps
Содержание MiVOICE BUSINESS
Страница 1: ...Mitel MiVoice Business RELEASE 7 2 ENGINEERING GUIDELINES ...
Страница 15: ...Chapter 1 ABOUT THIS DOCUMENT ...
Страница 16: ......
Страница 22: ...Engineering Guidelines 8 ...
Страница 23: ...Chapter 2 SYSTEM OVERVIEW ...
Страница 24: ......
Страница 28: ...Engineering Guidelines 14 ...
Страница 29: ...Chapter 3 TYPICAL CONFIGURATIONS ...
Страница 30: ......
Страница 73: ...Chapter 4 PHONES AND VOICE APPLICATIONS ...
Страница 74: ......
Страница 95: ...Phones and Voice Applications 81 Figure 9 ICP Connection Paths and Limitations ...
Страница 100: ...Engineering Guidelines 86 ...
Страница 101: ...Chapter 5 POWER ...
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Страница 128: ...Engineering Guidelines 114 ...
Страница 129: ...Chapter 6 PERFORMANCE ...
Страница 130: ......
Страница 135: ...Chapter 7 APPLICATIONS ...
Страница 136: ......
Страница 142: ...Engineering Guidelines 128 ...
Страница 143: ...Chapter 8 EMERGENCY SERVICES ...
Страница 144: ......
Страница 151: ...Chapter 9 IP NETWORKING ...
Страница 152: ......
Страница 167: ...Chapter 10 LICENSING ...
Страница 168: ......
Страница 183: ...Chapter 11 BANDWIDTH CODECS AND COMPRESSION ...
Страница 184: ......
Страница 209: ...Chapter 12 NETWORK CONFIGURATION CONCEPTS ...
Страница 210: ......
Страница 244: ...Engineering Guidelines 230 ...
Страница 245: ...Chapter 13 NETWORK CONFIGURATION SPECIFICS ...
Страница 246: ......
Страница 309: ...Appendix A CAT 3 WIRING ...
Страница 310: ......
Страница 315: ...CAT 3 Wiring 301 Figure 55 CX MX MXe AX and LX Minimum Cable Standard ...
Страница 316: ...Engineering Guidelines 302 ...
Страница 317: ...Appendix B INSTALLATION EXAMPLES ...
Страница 318: ......
Страница 335: ...Appendix C LLDP AND LLDP MED CONFIGURATION EXAMPLES ...
Страница 336: ......
Страница 347: ...Appendix D VOIP AND VLANS ...
Страница 348: ......
Страница 353: ...Appendix E VOIP SECURITY ...
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Страница 381: ... ...