ITU-T P.1140 is an ITU-T P-series voice quality standard, full name Requirements for speech communication for vehicle-originated emergency calls, dedicated to vehicle emergency call speech communication performance. The latest official version is P.1140 (10/21), replacing old 2015 and 2017 editions for all new projects.
Detailed Test Items
Tested Content
Echo suppression, noise suppression, gain control, sidetone control, frequency response, distortion and signal-to-noise ratio. All tests adopt professional laboratory simulation methods to evaluate real emergency call speech clarity.
Non-Covered Content
Not applicable to crash test, collision noise, voice coding and data transmission synchronization; only responsible for speech communication quality assessment.
Applicable Product Scope
·EU eCall System: Mandatory P.1140 compliance for all new passenger cars, light commercial vehicles, T-Box and emergency ECU suppliers.
·Vehicle Emergency Call Components: On-board infotainment system with embedded emergency call function needs P.1140 test report for certification.
·Russia ERA-GLONASS System: Adopt independent GOST standard, incompatible with P.1140; dual-market products need separate testing.
·Reference Markets: Most countries reference P.1140 as test basis, subject to local mandatory regulations.
Practical Application Guidelines
Implement the latest 2021 version strictly; select professional vehicle audio laboratories with rich project experience; test reports are recognized within 1–3 years; re-evaluation and retest are required after microphone and audio structure modification.
P.1140 is a key link in emergency call certification related to rescue efficiency. For standard interpretation and testing arrangement, contact Blueasia consultant: 13534225140
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