Avaya Configuring Data Compression Services Instrukcja Użytkownika Pobierz pdf (Strona 23)

117352-A Rev. A 2-1

Chapter 2

Data Compression Overview

Bay Networks data compression services enable you to reduce line costs and

improve response times over wide area networks. Our data compression

eliminates redundancies in data streams. When you use compression on your

network, bandwidth efﬁciency improves, and you can transmit more data over a

given amount of network bandwidth.

Our compression services include

• Software-based compression for Frame Relay, Point-to-Point Protocol (PPP),

and X.25 networks for all router platforms and all serial interfaces. This

includes PPP compression on multiline, multilink, on the ISDN BRI and PRI

modules, and on interfaces that use raise DTR or V.25 bis signaling with dial

services. It also includes Frame Relay compression on multiline and dial

backup.

• Hardware-based compression for Frame Relay and PPP networks that use the

octal synchronous link module for the BN using Fast Routing Engine-2

(FRE

-2) processors. Hardware compression supports all of the PPP and

Frame Relay services that software compression supports.

• Hardware-based compression for Frame Relay and PPP networks for the

ASN. A compression net module compresses data transmitted over a WAN

network by dual and quad synchronous, MCE1/ISDN PRI, MCT1/ISDN, dual

sync with ISDN BRI, and QBRI net modules. Hardware compression

supports all of the PPP services that software compression supports.

Bay Networks software- and hardware-based compression interoperate fully

because they use the same algorithm.

To use data compression effectively, you must decide how to allocate memory for

this task. The goal is to compress data as much as possible and to transmit the data

as quickly as possible without unduly taxing the resources of the router.

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Avaya Configuring Data Compression Services Instrukcja Użytkownika Strona 23