This Recommendation provides specifications for voice service transmission measurement devices that provide measurements on an in-service and non-intrusive basis. These In-Service, Non-intrusive Measurement Devices (INMDs) are utilised primarily for the measurement of voice-grade parameters such as speech level, noise level, echo loss and speech echo path delay.
ITU-T P.561 FRENCH-2002 Referenced Document
ITU-T G.122-1993 Influence of National Systems on Stability and Talker Echo in International Connections Study Group 12
ITU-T G.131-1996 Control of Talker Echo - Series G: Transmission Systems and Media International Telephone Connections and Circuits - General Characteristics of the 4-Wire Chain Formed by the International Circuits and National Extension Circuits (Study Group 12)
ITU-T G.212-1988 Hypothetical reference circuits for analogue systems
ITU-T G.223-1988 Assumptions for the Calculation of Noise on Hypothetical Reference Circuits for Telephony - International Analogue Carrier Systems (Study Group XV) 9 pp
ITU-T G.703-2001 Physical/Electrical Characteristics of Hierarchical Digital Interfaces - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Terminal Equipments - General Study Group 15; Erratum 1: Covering Note: 07/20/2005*， 2024-04-19 Update
ITU-T G.712-2001 Transmission performance characteristics of pulse code modulation channels = SERIES G: TRANSMISSION SYSTEMS AND MEDIA DIGITAL SYSTEMS AND NETWORKS - Digital terminal equipments - Coding of analogue signals by pulse code modulation*， 2024-04-19 Update
ITU-T G.763-1998 Digital Circuit Multiplication Equipment Using G.726 ADPCM and Digital Speech Interpolation - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Terminal Equipments - Principal Characteristics of Transcod
ITU-T G.772-1993 PROTECTED MONITORING POINTS PROVIDED ON DIGITAL TRANSMISSION SYSTEMS (Study Group XV)
ITU-T M.3010-2000 Principles for a Telecommunications Management Network Study Group 4
ITU-T O.41-1994 Psophometer for Use on Telephone-Type Circuits - Specifications for Measuring Equipment - Equipment for the Measurement of Analogue Parameters (Study Group 4) 17 pp [Superseded: ITU-T P.53]
ITU-T P.10-1998 Vocabulary of Terms on Telephone Transmission Quality and Telephone Sets - Series P: Telephone Transmission Quality@ Telephone Installations@ Local Line Networks Vocabulary and Effects of Transmission Parameters on Customer Opinion of Transmission Quality
ITU-T P.48-1988 SPECIFICATION FOR AN INTERMEDIATE REFERENCE SYSTEM
ITU-T P.56-1993 Objective Measurement of Active Speech Level - Telephone Transmission Quality Objective Measuring Apparatus (Study Group XII) 15 pp