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TechSpec
  • Foreword
  • 1 Scope
  • 2 Network configurations
  • 3 Transmission performance
    • 3 Transmission performance
    • 3.1 Overall Loss/Loudness ratings
    • 3.2 Stability Loss
    • 3.3 Delay
    • 3.4 Echo
    • 3.5 Clipping
    • 3.6 Idle channel noise (handset and headset MS)
    • 3.7 Noise contrast
    • 3.8 Sensitivity/frequency characteristics
    • 3.9 Distortion (handset and headset MS)
    • 3.10 Sidetone (handset and headset MS)
    • 3.11 Not used
    • 3.12 Requirements for information tones
    • 3.13 Crosstalk
    • 3.14 MS Ambient Noise Rejection
  • A.1 Handsfree MS
  • A.2 Handset MS
  • A.3 Headset MS
  • A.4 Inter‑reaction with DTX
  • C.1 Not usedC.2 Not usedC.3 Not usedC.4 Not usedC.5 Variation of gain with input level
  • C.6 Not used
  • C.7 Not used
  • C.8 Not used
  • C.9 Not used
  • C.10 Delay for handsfree MS
  • D.1 Full rate MS delay requirement definition
  • D.2 Half rate MS delay requirement definition

A.3 Headset MS

3GPP43.050Release 17Transmission planning aspects of the speech service in the GSM Public Land Mobile Network (PLMN) systemTS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The headset MS is likely to be the simplest, since with careful design, it might not require acoustic echo control. As with the handset case, the signal‑to‑noise ratio should be significantly improved compared with the handsfree MS especially in noisy environments. Consequently, the headset MS is likely to give the best transmission quality and easiest duplex conversation.