scope:

The aim of this Recommendation is the definition of user scenarios, test methods and requirements for wideband hands-free communication in motor vehicles. The Recommendation covers:

- build in hands-free systems,

- after market hands-free car kits,

- corded headsets, and

- wireless headsets,

to be used in motor vehicles for communication.

Furthermore, the compatibility between narrowband and wideband implementations is addressed.

The Recommendation addresses the test of complete systems as well as the subsystems hands-free microphone and the telephone with short range wireless transmission link used to transmit the speech signals from the hands-free system to the mobile network.

For testing the test setup and the recommended environmental conditions are described.

The methods, the analysis and the performance parameters described in this Recommendation are based on test signals and test procedures, as defined in [ITU-T P.50], [ITU-T P.501], [ITU-T P.502], [ITU-T P.340], [ITU-T P.380], [b-ETSI ES 202 739], and [b-ETSI ES 202 740].

Although important subjective testing is outside the scope of this Recommendation, guidance on how to conduct subjective tests can be found in clause 14.