1 Preamble
2
Introduction
3
Definitions
4
Guidelines regarding individual transmission parameter limits
4.1 Network performance objective for attenuation distortion
4.2 Network performance objective for circuit noise
4.3 Network performance objective for group delay distortion
4.4 Network performance objective for talker echo
4.5 One-way transmission time
4.6 Effect of random bit errors
4.7 Effect of burst errors
4.8 Effect of speech clipping
4.9 Transmission impairments due to digital processes
5
The quantization distortion method
5.1 General
5.2 Discussion
5.3 Threshold of
acceptability
5.4 Limitations
5.5 Quantization distortion allocations to digital processes
5.6 Planning rule
5.7 Limitations of the planning rule
6
The equipment impairment factor method
7
Consideration of the combination effects of transmission impairments
7.1 General
7.2 Impairment factors and the total impairment value
7.3 Planning values for impairment factors
8
Considerations Concerning the Expectation Factor A
9
Considerations associated with the Calculated Planning Impairment Factor
Icpif
10 Effect of transmission
impairments on voiceband data performance
Annex A – Information for planning purposes concerning attenuation distortion
and group-delay distortion introduced by circuits and exchanges in the switched
telephone network
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
C.1 Introduction
C.2 Test condition architecture
C.3 Conclusions
Annex D – Compatibility of speech
coding algorithms and voiceband data
Annex E – Methodology for derivation of
impairment factors