1 General
1.1 Scope
1.2 References
1.3 Abbreviations
2 Handset technical requirements
2.1 Sending characteristics
2.2 Receiving characteristics
2.3 Sidetone characteristics
2.4 Noise contrast and comfort noise
2.5 Weighted terminal coupling loss
(TCLw)
2.6 Stability loss
2.7 Delay
2.8 Out-of-band signals
2.9 Crosstalk ratio
2.10 Speech clipping
2.11 Maximum steady state acoustic
pressure
3 Hands-free technical requirements
3.1 Hands-free sending characteristics
3.2 Hands-free receiving
characteristics
3.3 Weighted terminal coupling loss
3.4 Switching characteristics
3.5 Double talk performance
3.6 Background noise transmission and comfort
noise injection
3.7 Delay
Annex A – Information
on testing a hands-free mobile terminal in a car
A.1 Electro-acoustic equipment
A.2 Test arrangement in a car
A.3 Test signals and methods