Mitel 5560 IPT none Specifications download pdf (Page 199)

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Bandwidth, Codecs and Compression

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Figure 26: Codec Zone Interconnect Example

Operation through MiVoice Border Gateway and SRC

At Release MCD 5.0 and MBG 6.1, there is no transcoding support for the wideband G.722.1

CODEC via the MiVoice Border Gateway or SRC. As such, the MiVoice Border Gateway and

SRC will default to only negotiate connections with G.711 and G.729 CODEC types.

The SRC will ensure that the connected phones only negotiate to G.711 or G.729 and will provide

G.729 to G.711 transcoding, if needed, when compression licenses are installed. Any Call

Recording Equipment (CRE) attached to the SRC will continue to be supported with G.711 and

G.729 CODEC types.

The MiVoice Border Gateway will ensure that the connected phones only negotiate to G.711

or G.729 and will provide G.729 to G.711 transcoding, if needed, when compression licenses

are installed.

Compression – Introduction

Generally when compression is mentioned, it is usually mentioned with a CODEC, for example,

“G.729 Compression.” This just refers to the ability to reduce the amount of data that needs to

be carried across the IP infrastructure.

In the case of CODEC compression, this works by reducing the amount of data that needs to

be carried in the voice payload. However, the IP header information still needs to be added, so

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