1 Scope
2
References
3
Abbreviations and definitions
3.1 Abbreviations
3.2 Definitions
4
Overview
4.1 Addressed issues
4.2 Direction of transmission
4.3 Number of calls
4.5 Facsimile terminal selection
5
Facsimile terminal configurations
5.1 Standard Group 3 facsimile mode
5.1.1 Std/Conf/1: Reference configuration
5.1.2 Std/Conf/2
5.1.3
Std/Conf/3
5.1.4 Std/Conf/4
5.2 Non-standard Group 3 facsimile mode
5.2.1 Non-standard Group 3 facsimile mode 1
5.2.2 Non-standard Group 3 facsimile mode 2
6
Network conditions
6.1 Access-link impairments
6.1.1 Definition
6.1.2 Access link impairments conditions
6.2 Traffic loading
6.2.1 Definition
6.2.2 Loading conditions
6.3 Delay
6.4 Bearer impairments
6.4.1 Circuit-oriented CME
6.4.2 Identification of the bearer channels
with markers
6.4.3 Packet-oriented CME
6.4.4
Bearer conditions
6.5 Forward error correction
6.6 Return echo level
6.7 Reference conditions
6.7.1 Reference test condition 1
6.7.2 Reference test condition 2
6.7.3 Reference test condition 3
6.7.4 Reference test condition 4
6.7.5 Reference test condition 5
6.7.6 Reference test condition 6
6.7.7 Reference test condition 7
6.7.8 Reference test condition 8
7
Facsimile call quality assessment
8
Baseline measurements
8.1 Facsimile terminal baseline tests
8.2 CME baseline tests
9
Test methodology
Annex A – Group 3 facsimile procedures
A.1 Group 3 facsimile recognition: detection and classification
A.1.1 Objective
A.1.2 Settings
A.1.3 Test conditions
A.1.4
Parameters of investigation
A.1.5 Monitoring/measurement points
A.2 Proprietary facsimile fall-back to ADPCM path
A.2.1 Objective
A.2.2 Settings
A.2.3 Test conditions
A.2.4 Parameters of investigation
A.2.5 Monitoring/measurement points
A.3 Group 3 facsimile image quality in presence of combined access
link and bearer link impairments
A.3.1
Objective
A.3.2 Settings
A.3.3 Test conditions
A.3.4 Monitoring/measurement points
A.4 Group 3 facsimile image quality in presence of bearer link
impairments
A.4.2 Settings
A.4.4 Monitoring/measurement points
A.5 CME recovery following unexpected events during facsimile call
progress
A.5.1 Objective
A.5.2 Settings
A.5.3 Test conditions
A.6 Voiceband data quality
A.6.1 Objective
A.6.2 Settings
A.6.3 Test conditions
A.6.4 Monitoring/measurement points
A.7 Effect of Group 3 facsimile protocol variability
A.7.1 Objective
A.7.2 Settings
A.7.3 Test conditions
A.7.4 Parameters of investigation
A.8 Effect of transmission level and echo return loss
A.8.1 Objective
A.8.2 Settings
A.8.3 Test conditions
A.8.4 Parameters of investigation
A.8.5 Monitoring/measurement points
A.9 Impact of transmission integrity due to timing deviations on
facsimile call quality
A.9.1 Objective
A.9.2 Settings
A.9.3 Test conditions
A.9.4
Monitoring/measurement points
A.10 Items for further study
A.10.1 Rates and modulation schemes
A.10.2 Facsimile quality assessment
A.10.3 Coding algorithms
A.10.4
Errors
A.10.5 CME networks
A.10.6 Other SPNE
Appendix I – Identifying a demodulated call in a DCME
I.1 Principles
I.2 Implementation