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61200.175L1-1 FSU 5622 ESP User Manual 5

Chapter 1. Introduction

VOICE COMPRESSION

The FSU 5622 ESP voice option cards employ MP-MLQ voice

compression technology to provide toll-quality voice using

significantly less bandwidth than traditional voice channels. In

addition to supporting voice calls, the cards support group 3

facsimile up to 9.6 kbps. Each voice channel requires an aggre-

gate bandwidth of 9.6 kbps for voice or 12 kbps for facsimile.

The FSU 5622 ESP dynamically allocates bandwidth to voice and

data applications. This results in all bandwidth being available

for data applications in the absence of voice or fax.

FXS Module

The FXS module provides two 2-wire compressed voice inter-

faces and serves as the source of line current and ringing voltage.

The ESP FXS serves as the station side of a foreign exchange

FXS/FXO application. The FXS may also be paired with another

FXS to provide private line automatic ringdown (PLAR) function

across the WAN.

FXO Module

The FXO module provides two 2-wire compressed voice inter-

faces and provides a load for line current. The module includes

a ring detector and a line current detector. The ESP FXO serves

as the office side of a foreign exchange FXS/FXO application.

E&M Module

The E&M module provides two 2- or 4-wire compressed voice

interfaces for use in E&M applications.

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