Table of Contents

Intellectual Property Rights
Foreword
Introduction
1 Scope
2 References
3 Definitions, symbols and abbreviations
   3.1 Definitions
   3.2 Symbols
   3.3 Abbreviations
4 General
   4.1 Apparatus types
   4.2 States of the Apparatus
   4.3 Call handling signalling messages
5 Physical connections
   5.1 Mechanical Aspects
   5.2 Loop presentation
6 D.C. feed condition
   6.1 Loop current - on line state
   6.2 Voltage
7 Seize signal
   7.1 Non seizure
   7.2 Seize condition
8 Clear signal
   8.1 Clear signal generated by TE
   8.2 Clear indication received from the network
9 Impedance
   9.1 Input impedance
   9.2 Apparatus balance return loss
   9.3 Balance about earth
   9.4 Stability
1 0 Transmission
   10.1 Loss
   10.2 Attenuation / frequency response
   10.3 Distortion
   10.4 Signal handling
   10.5 Variation of loss with signal level
   10.6 Outband signal to inband signal translation
   10.7 Noise
   10.8 Delay
11 Dialling
12 Ringing
   12.1 Ringing drive capability
   12.2 Ring cadence
   12.3 Ring trip
   12.4 Ring clear
13 Supervisory signals
   13.1 Supervisory tones
   13.2 Tone levels
   13.3 Timing
14 Optional functions
   14.1 Loop Disconnect dialling
   14.2 Register recall
   14.3 Metering
   14.4 ALASS services
History

Abstract

This document applies to apparatus providing an interface intended for the connection of approved pan-European PSTN, harmonised, 2-wire analogue TE, and defines the necessary electrical conditions at the interface to provide correct operation of TE connected via a short local loop.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	ATA