Recommendation ITU-T P.1140 defines use cases,requirements and associated test methods for speech communication for emergency call communications originating from vehicles using a dedicated emergency call system covering built-in emergency call systems (manufacturer installed) as well as after-market emergency call kits.This Recommendation contains an electronic attachment containing the set of freely-available test signals referred to within the Recommendation.
ITU-T P.1140-2015 Referenced Document
ITU-T G.100.1-2015 The use of the decibel and of relative levels in speechband telecommunications (Study Group 12)
ITU-T G.111-1993 Loudness Ratings (LRs) in an International Connection (Study Group XII) 21 pp
ITU-T P.1100 Narrowband hands-free communication in motor vehicles (Study Group 12)*， 2017-03-01 Update
ITU-T P.340 Transmission Characteristics and Speech Quality Parameters of Hands-Free Terminals Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Subscribers' Lines and Sets Study Group 12; Covering Note: March 31 2004
ITU-T P.501 Test signals for use in telephonometry (Study Group 12)*， 2017-03-01 Update
ITU-T P.502 Objective Test Methods for Speech Communication Systems Using Complex Test Signals Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Objective Measuring Apparatus Study Group 12
ITU-T P.56 (Pre-Published) Objective measurement of active speech level
ITU-T P.58 Head and torso simulator for telephonometry*， 2021-05-31 Update
ITU-T P.581-2014 Use of head and torso simulator for hands-free and handset terminal testing
ITU-T P.79 Calculation of loudness ratings for telephone sets (Study Group 12)*， 2024-04-20 Update
ITU-T P.830 Subjective Performance Assessment of Telephone- Band and Wideband Digital Codecs - Telephone Transmission Quality Methods for Objective and Subjective Assessment of Quality (Study Group 12) 27 pp
ITU-T P.1140-2015 history
2015ITU-T P.1140-2015 Speech communication requirements for emergency calls originating from vehicles (Study Group 12)