Rec. ITU-T G.113 (11/1988) – TRANSMISSION IMPAIRMENTS
1 Transmission impairment
2 Network performance objective for circuit noise on complete telephone connections
3 Transmission impairments due to digital processes
    3.1 Quantizing distortion
    3.2 Sources of quantizing distortion
    3.3 Effect of random bit errors
    3.4 Attenuation distortion and group-delay distortion
    3.5 Provisional planning rule
    3.6 Limitations of the provisional planning rule
4 Effect of transmission impairments on voiceband data performance
ANNEX A – Information for planning purposes concerning attenuation distortion and group-delay distortion introduced by circui
References
ANNEX B – Effect of transmission impairments on voiceband data
B.1 Introduction
B.2 Impulse noise
B.3 Envelope delay (group delay)
B.4 Phase jitter
B.5 Non-linear distortion
B.6 Tone-to-noise ratio
B.7 Frequency shift
B.8 Gain and phase transients
ANNEX C – Adaptive differential pulse code modulation (ADPCM) performance impact on voiceband data
Abstract
C.1 Introduction
C.2 Test condition architecture
C.3 Conclusions
References