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Data Compression Overview

114061 Rev. A 2-11

X.25 Services

An X.25 network permits as many as 128 VCs to exist on the same physical link at

the same time. You can conﬁgure each of those interfaces individually to use data

compression or not.

X.25 PDN and DDN Services

When you use data compression on circuits that you conﬁgure for X.25 PDN or

DDN services, you must be careful to enable compression on both sides of the

link. If you conﬁgure compression on only one side of a PDN or DDN link, the

data that travels over that link will be garbled.

You must also remember to enable the X.25 service record compression parameter

for each X.25 interface that you conﬁgure. See Conﬁguring X.25 Services for

more information about this parameter.

Adjusting X.25 Max Window Size

Window size can affect packet throughput across the X.25 network. Setting the

X.25 Max Window Size parameter too low can cause the router to drop packets

and render data compression ineffective. You should conﬁgure this parameter at a

higher value than the default setting.

Summary of Bay Networks Data Compression Features

You can conﬁgure both software- and hardware-based compression

• On a circuit or line basis

• With multiline and multilink

Features speciﬁc to software and hardware compression follow.

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Avaya Configuring Data Compression Services Manual de usuario Pagina 37