1 Scope
2
References
3
Definitions
4
Description of model
4.1 Overview
4.2 Echo control requirements
4.3 Round-trip delay criteria
4.4 Modem impedance requirements
4.5 Model limitations
4.6 Digital impairment requirements
4.7 Network Model Coverage (NMC)
5
Impairment level set-up
Annex
A – Attenuation and envelope delay distortion
characteristics
Annex
B – Minimizing test time
Appendix I – Rare
intracontinental network model
I.1 Model description
Appendix
II – Basis for network models
Appendix
III – Error rate vs. network model coverage
III.1 Bit- and block-error rate vs. network model coverage
Appendix IV – Supplemental
round trip delay model