H.1 Overview

26.1323GPPRelease 18Speech and video telephony terminal acoustic test specificationTS

The ECRP for handset UEs providing an acoustic outlet is defined according to Annex E.1 and E.2 of Recommendation ITU-T P.64 [18]. This positioning approach cannot be used for handsets without a traditional ear cap. Instead, Annex E.3 of [18] can be used, which specifies ECRP of a handset device in terms of distances from the upper edge (d_y) and from a centre/symmetry line (d_z). With these definitions, a manufacturer-defined ECRP (MECRP) can be specified for testing such devices.

However, in case MECRP is not available or not provided by the manufacturer, the method described in the following allows at least a suitable and reproducible positioning of a handset.

NOTE: Even though the method described in the following mimics user behaviour, i.e., multiple typical positions, the determination of a custom ECRP may not result in optimal performance. Whenever available, the use of MECRP is preferred.