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GEO-MOBILE RADIO INTERFACE SPECIFICATIONS; PART 3: NETWORK SPECIFICATIONS; SUB-PART 14: TRANSMISSION PLANNING ASPECTS OF THE SPEECH SERVICE IN THE GMR-1 SYSTEM; GMR-1 03.050
European Telecommunications Standards Institute
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Availability date: 11/06/2021
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Foreword
Introduction
1 Scope
2 References
3 Abbreviations
4 Overview
5 Network configurations
5.1 General
5.2 Model of the PSMN
5.3 Interfaces
5.4 Configurations of connections
5.5 4-wire circuits in the PSMN
6 Transmission performance
6.1 Overall loss/loudness ratings
6.2 Stability loss
6.3 Delay
6.4 Echo
6.5 Clipping
6.6 Idle channel noise
6.7 Noise contrast
6.8 Sensitivity/frequency characteristics
6.9 Distortion
6.10 Sidetone
6.11 Out-of-band signals
6.12 Requirements for information tones
6.13 Crosstalk
Annex A (informative): Considerations on the acoustic
interface of the mobile earth station
A.1 Handsfree MES
A.2 Handset MES
A.3 Headset MES
A.4 Inter-reaction with DTX
Annex B (normative): Transmission requirements
testing
B.1 Loudness rating
B.2 Idle channel noise
B.3 Sensitivity/frequency characteristics
B.4 Distortion
B.5 Variation of gain with input level
B.6 Sidetone
B.7 Sidetone distortion
B.8 Out-of-band signals
B.9 Acoustic echo loss
Annex C (informative): MES delay requirement
definition
History
This standard describes the transmission planning aspects pertaining to the speech service in the GMR-1 Mobile Satellite System.
Published | |
Document Type | Standard |
Status | Current |
Publisher | European Telecommunications Standards Institute |
Pages | |
ISBN | |
Committee | SES GMR-S |