Echo Canceller Installation; Contents; Introduction; Echo Canceller Operating Parameters - Nortel 1000 Installation And Commissioning Manual

Echo canceller installation

Contents

The section contains information on the following topics:
"Introduction" (page 191)
"Echo canceller operating parameters" (page 191)
"Echo canceller initialization procedures" (page 191)
"PRI to Echo canceller pin assignments" (page 192)
"Electromagnetic Interference" (page 192)

Introduction

Echo cancellers are required only in cases where satellite transmission is
being used. The echo canceller detects the length of the loop, and cancels
out transmission reflections (which result in audible echoes of voices on
satellite-carried calls).

Echo canceller operating parameters

The operational parameters of the echo canceller must be:
•
•
•
•

Echo canceller initialization procedures

Each of the 24 channels on the echo canceller must be initialized as shown
here:
•
•
Copyright © 2003-2007, Nortel Networks
.
Data transfer rate: 4800 baud
System unit number: 1
Display timeout: active
Failures before alarm: 3
Bypass: OFF
Off-hook: ON
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
191