ETS 300 451 : 20001
Current
The latest, up-to-date edition.
BUSINESS TELECOMMUNICATIONS (BTC) - ORDINARY QUALITY VOICE BANDWIDTH 4-WIRE ANALOGUE LEASED LINE (A4O) - CONNECTION CHARACTERISTICS AND NETWORK INTERFACE PRESENTATION
Hardcopy , PDF
English
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4 Requirements and tests
4.1 Connection characteristics
4.2 Interface presentation
4.3 Safety
4.4 Overvoltage protection
4.5 ElectroMagnetic Compatibility (EMC)
4.6 Availability
Annex A (normative): Test methods
A.1 General
A.2 Test Methods
Annex B (informative): Weighted return loss
measurements
B.1 Introduction
B.2 Weighting function
Annex C (informative): Overall loss and quantizing
distortion
C.1 Introduction
C.2 Overall loss
C.3 Quantizing distortion
Annex D (informative): Availability
D.1 General
D.2 Definition of unavailability periods
D.3 Availability figures
Annex E (informative): Bibliography
History
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