I-ETS 300 281 : MAY 94
Current
The latest, up-to-date edition.
INTEGRATED SERVICES DIGITAL NETWORK (ISDN) - TELEPHONY 7 kHz TELESERVICE - TERMINAL REQUIREMENTS NECESSARY FOR END TO END COMPATIBILITY
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions and symbols
3.1 Teleservices
3.2 Modes of operation
3.3 Terminal types
3.4 Acoustic Reference Level (ARL)
3.5 Weighted Terminal Coupling Loss (TCLw)
4 Abbreviations
5 D-channel characteristics
5.1 General
5.2 Outgoing calls
5.3 Incoming calls
5.4 Support of supplementary services
5.5 Interim procedures
5.6 Call clearing
6 B-channel characteristics
6.1 Relative level
6.2 Signal encoding
6.3 Signal decoding
6.4 Speech transmission characteristics (handset
mode)
7 In-band signalling
7.1 Frame structure
7.2 Telephony 7 kHz BAS attributes
7.3 Sequences
7.4 Procedures
Annex A (normative): Test methods
A.1 General conditions for testing
A.2 Speech transmission requirements testing
Annex B (informative): Bibliography
History
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