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ITU-T, Handbook on Telephonometry (1993).

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ITU-T Recommendation E.651, Reference Connections for Traffic Engineering of IP Access Networks (2000).

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ITU-T Recommendation G.107, The E-Model, a Computational Model for Use in Transmission Planning (1998).

ITU-T Recommendation G.108, Application of the E-Model – a Planning Guide (1999).

ITU-T Recommendation G.109, Definition of Categories of Speech Transmission Quality (1999).

ITU-T Recommendation G.113, Transmission Impairments (1996).

ITU-T Recommendation G.114, One-Way Transmission Time (1996).

ITU-T Recommendation G.120, Transmission Characteristics of National Networks (1998).

ITU-T Recommendation G.121, Loudness Ratings (LRS) of National Systems (1993).

ITU-T Recommendation G.122, Influence of National Systems on Stability and Talker Echo in International Connections (1993).

ITU-T Recommendation G.131, Control of Talker Echo (1996).

ITU-T Recommendation G.160, Voice Enhancement Devices, draft 14 (2004).

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ITU-T Recommendation G.164, Echo Suppressors (1988).

ITU-T Recommendation G.165, Echo Cancellers (1993).

ITU-T Recommendation G.167, Acoustic Echo Controllers (1993).

ITU-T Recommendation G.168, Digital Network Echo Cancellers (1997, 2000, 2002).

ITU-T Recommendation G.169, Automatic Level Control Devices (1999).

ITU-T Recommendation G.191, Software Tools for Speech and Audio Coding Standardization (2000).

ITU-T Recommendation G.192, A Common Digital Parallel Interface for Speech Standardization Activities (1996).

ITU-T Recommendation G.212, Hypothetical Reference Circuits for Analogue Systems (1988).

ITU-T Recommendation G.223, Assumptions for the Calculation of Noise on Hypothetical Reference Circuits for Telephony (1988).

ITU-T Recommendation G.703, Physical/Electrical Characteristics of Hierarchical Digital Interfaces (2001).

ITU-T Recommendation G.711, Pulse Code Modulation (PCM) of Voice Frequencies (1988).

ITU-T Recommendation G.712, Transmission Performance Characteristics of Pulse Code Modulation Channels (2001).

ITU-T Recommendation G.722, 7 kHz Audio-Coding within 64 kbit/s (1988).

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ITU-T Recommendation G.726, 40, 32, 24 and 16 kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) (1990).

ITU-T Recommendation G.727, 5-, 4-, 3- and 2-Bit/Sample Embedded Adaptive Differential Pulse Code Modulation (ADPCM) (1990).

ITU-T Recommendation G.728, Coding of Speech at 16 kbit/s Using Low-Delay Code Excited Linear Prediction (1992).

ITU-T Recommendation G.729, Coding of Speech at 8 kbit/s Using Conjugate-Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP) (1996).

ITU-T Recommendation G.763, Digital Circuit Multiplication Equipment Using (Recommendation G.726) ADPCM and Digital Speech Interpolation (1998).

ITU-T Recommendation G.772, Protected Monitoring Points Provided on Digital Transmission Systems (1993).

ITU-T Recommendation G.826, Error Performance Parameters and Objectives for International, Constant Bit Rate Digital Paths at or Above the Primary Rate (1999).

ITU-T Recommendation G.1000, Communications Quality of Service: a Framework and Definitions (2001).

ITU-T Recommendation G.1010, End-User Multimedia QOS Categories (2001).

ITU-T Recommendation I.350, General Aspects of Quality of Service and Network Performance in Digital Networks, Including ISDN (1993).

ITU-T Recommendation I.460, Multiplexing, Rate Adaptation and Support of Existing Interfaces.

ITU-T Recommendation M.3010, Principles for a Telecommunications Management Network (2000).

ITU-T Recommendation O.41, Psophometer for Use on Telephone-Type Circuits (1994).

ITU-T Recommendation O.131, Quantizing Distortion Measuring Equipment Using a Pseudo-Random Noise Test Signal (1988).

ITU-T Recommendation O.132, Quantizing Distortion Measuring Equipment Using a Sinusoidal Test Signal (1988).

ITU-T Recommendation O.133, Equipment for Measuring the Performance of PCM Encoders and Decoders (1993).

ITU-T Recommendation Series P, Telephone Transmission Quality, Methods for Objective and Subjective Assessment of Quality.

ITU-T Recommendation P.10, Vocabulary of Terms on Telephone Transmission Quality and Telephone Sets (1998).

ITU-T Recommendation P.11, Effect of Transmission Impairments (1993).

ITU-T Recommendation P.48, Specification for an Intermediate Reference System (1998).

ITU-T Recommendation P.50, Artificial Voices (1999).

ITU-T Recommendation P.51, Artificial Mouth (1996).

ITU-T Recommendation P.56, Objective Measurement of Active Speech Level (1993).

ITU-T Recommendation P.57, Artificial Ears (1996).

ITU-T Recommendation P.58, Head and Torso Simulator for Telephonometry (1996).

ITU-T Recommendation P.76, Determination of Loudness Ratings; Fundamental Principles (1988).

ITU-T Recommendation P.78, Subjective Testing Method for Determination of Loudness Ratings in Accordance With Recommendation P.76 (1993).

ITU-T Recommendation P.79, Calculation of Loudness Ratings for Telephone Sets (1993).

ITU-T Recommendation P.79, Wideband Loudness Rating Algorithm, annex G (Nov. 2001).

ITU-T Recommendation P.80, Methods for Subjective Determination of Transmission Quality (1993).

ITU-T Recommendation P.81, Modulated Noise Reference Unit (MNRU), vol. of blue book (Geneva: International Telecommunication Union, 1989), 198–203.

ITU-T Recommendation P.82, Method for Evaluation of Service from the Standpoint of Speech Transmission Quality (1984).

ITU-T Recommendation P.84, Subjective Listening Test Method for Evaluating Digital Circuit Multiplication and Packetized Voice Systems (1993).

ITU-T Recommendation P.85, A Method for Subjective Performance Assessment of the Quality of Speech Voice Output Devices (1994).

ITU-T Recommendation P.310, Transmission Characteristics for Telephone Band (300–3400 Hz) Digital Telephones (2000).

ITU-T Recommendation P.311, Transmission Characteristics for Wideband (150–7000 Hz) Digital Handset Telephones (Feb. 1998).

ITU-T Recommendation P.340, Transmission Characteristics and Speech Quality Parameters of Hands-Free Terminals (2000).

ITU-T Recommendation P.341, Transmission Characteristics for Wideband (150–7000 Hz) Digital Hands-Free Telephony Terminals (Feb. 1998).

ITU-T Recommendation P.501, Test Signals for Use in Telephonometry (1996).

ITU-T Recommendation P.502, Objective Test Methods for Speech Communication Systems Using Complex Test Signals (2000).

ITU-T Recommendation P.561, In-Service Non-Intrusive Measurement Device – Voice Service Measurements (1996).

ITU-T Recommendation P.563, Single Ended Method for Objective Speech Quality Assessment in Narrow-Band Telephony Applications (2004).

ITU-T Recommendation P.581, Use of Head and Torso Simulator (HATS) for Hands-Free Terminal Testing (2000).

ITU-T Recommendation P.800, Methods for Subjective Determination of Transmission Quality (Aug. 1996).

ITU-T Recommendation P.810, Modulated Noise Reference Unit (MNRU) (1996).

ITU-T Recommendation P.830, Subjective Performance Assessment of Telephone-Band and Wideband Digital Codecs (Aug. 1996).

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