This Recommendation specifies electrical requirements and test methods for a multi-microphone headset/headphone interface used in digital mobile terminals. The principle of this recommendation is to ensure adequate compatibility between the digital mobile terminal and the universal and multi-microphone wired analogue headset/headphone@ and to have better user experience. The universality of the multi-microphone headset/headphone interface will facilitate the separation of sales between digital mobile terminals and headsets/headphones. One of the benefits is that users are free to choose their favourite type of headset or headphone in the market. In the long run@ it will reduce E-waste. Furthermore@ the universal interface can be used as the electric coupling design in hands-free systems and hearing aids for wider harmonization. To give specifications to manufacturers and encourage them to adopt the universal headset interface@ the mechanical dimensions are shown in an Appendix for at least configurations with five poles. This Recommendation applies to digital mobile terminals with physical analogue audio output/input interface that need to support headsets with >1 microphone. Other similar ICT equipment may also refer to this Recommendation. This Recommendation does not apply to terminals designed solely for digital headset/headphone usage.