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ITU-T P.381 (02/2014)

Technical requirements and test methods for the universal wired headset or headphone interface of digital mobile terminals

Recommendation ITU-T P.381 specifies critical physical and electrical-acoustical characteristics for the universal headset interface and provides corresponding test methods. Both 3.5 mm and 2.5 mm diameter headset/headphone interfaces have been widely used in digital mobile terminals in recent years. Nowadays, the consumer is free to choose either the headset/headphone originally provided by the terminal manufacturer or others that are offered separately. However, the quality of service (QoS)/quality of experience (QoE) perceived by users is influenced by both the electrical performance of the interface and the compatibility between the terminal and the connected headset/headphone.

Citation:	https://handle.itu.int/11.1002/1000/12139
Series title:	P series: Telephone transmission quality, telephone installations, local line networks P.300-P.399: Voice terminal characteristics
Approval date:	2014-02-13
Provisional name:	P.UHIP
Approval process:	AAP
Status:	Superseded
Maintenance responsibility:	ITU-T Study Group 12
Further details:	Patent statement(s) Development history Associated test signals

EditionsRelated Supplement(s)

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
6	P.381 (03/2023)	In force	here	here	here
5	P.381 (10/2020)	Superseded	here	here	here
4	P.381 (03/2017)	Superseded	here	here	here
3	P.381 (07/2016)	Superseded	here	here	here
2	P.381 (02/2014)	Superseded	here	here	here
1	P.381 (08/2012)	Superseded	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
P Suppl. 10 (11/1988)	Considerations relating to transmission characteristics for analogue handset telephones	In force	-	here	here
P Suppl. 16 (11/1988)	Guidelines for placement of microphones and loudspeakers in telephone conference rooms and for group audio terminals (GATs)	In force	-	here	here
P Suppl. 20 (03/1993)	Examples of measurements of handset receive-frequency responses: dependence on earcap leakage losses	In force	-	here	here
P Suppl. 23 (02/1998)	ITU-T coded-speech database	In force	here	here	here
P Suppl. 24 (10/2005)	Parameters describing the interaction with spoken dialogue systems	In force	here	here	here
P Suppl. 25 (01/2011)	Parameters describing the interaction with multimodal dialogue systems	In force	here	here	here
P Suppl. 26 (09/2017)	Scenarios for the subjective evaluation of audio and audiovisual multiparty telemeeting quality	In force	here	here	here
P Suppl. 28 (09/2020)	Considerations for the development of new QoS and QoE related objective models to be embedded in Recommendations prepared by ITU-T Study Group 12	In force	here	here	here
P Suppl. 31 (01/2025)	Subjective quality evaluation of audiovisual communication in videotelephony services	In force	here	here	here

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ITU-T Recommendations

ITU-T P.381 (02/2014)