Avaya Configuring Data Compression Services Manuel d'utilisateur télécharger pdf (Page 37)

Data Compression Overview

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• A 128-contexts compression daughterboard or net module can run

compression simultaneously over 127 CPC contexts, each using an 8 KB

history size, with one shared 8 KB PPC context.

• A 256-contexts advanced compression coprocessor daughterboard installed

on a FRE-2-060E processor module can run compression simultaneously over

255 CPC contexts, each using an 8 KB history size, with one shared

8 KB PPC context.

The 32-contexts, 128-contexts, and 256-contexts daughterboards and net modules

differ in their amount of memory.

• The 32-contexts daughterboard and net module have 512 KB compression/

256 KB decompression.

• The 128-contexts daughterboards and net module have 2 MB compression/

1 MB decompression.

• The 256-contexts advanced compression coprocessor daughterboard has

4 MB compression/2 MB decompression.

For information about customizing CPC and PPC, see Chapter 3

, “Customizing

Data Compression.”

Hardware Compression Contexts for Hi/fn LZS

Hi/fn LZS supports a 2 KB history size and CPC contexts only. Hi/fn LZS does

not support PPC contexts.

Note:

You should plan your network to use hardware compression on the VCs

most important to you within the limits of your equipment. If you configure

more VCs for hardware compression than your daughterboard or net module

can support, you cannot control which VCs will use hardware compression.

By default, all VCs that exceed the hardware context limit use software

compression.

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Avaya Configuring Data Compression Services Manuel d'utilisateur Page 37