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3GPP (SA4)
TS 03.50














Transmission Planning Aspects of the Speech Service in the GSM Public Land Mobile Network (PLMN) System

(P) GSM Rel-99 v8.1.1    2000/11    58 p.
(P) GSM Rel-98 v7.1.1    2000/11    58 p.
(P) GSM Rel-97 v6.2.1    2000/11    58 p.
(P) GSM Rel-96 v5.4.0    2000/06    59 p.
(P) GSM Phase-2 v4.6.1    1999/03    48 p.
(P) GSM Phase-1 v3.4.0    1994/07    29 p.

Rapporteur:  USAI, Paolino
Descendant(s):  TS 43.050    

This TS describes the transmission planning aspects pertaining to the speech service in the GSM PLMN system. Due to technical and economic factors, there cannot be full compliance with the general characteristics of international telephone connections and circuits recommended by the ITU T.

This TS gives guidance as to the precautions, measures and minimum requirements needed for successful interworking of the PLMN with the national and international PSTN. This TS identifies a number of routeing and network configurations. The objective is to reach a quality as close as possible to ITU T standards in order to safeguard the performance seen by PSTN customers.

1   Scope   PDF-p. 8
2   Network configurations   PDF-p. 11
3   Transmission performance   PDF-p. 13
3.1   Overall Loss/Loudness ratings
3.2   Stability Loss   PDF-p. 15
3.3   Delay
3.4   Echo   PDF-p. 18
3.5   Clipping
3.6   Idle channel noise (handset and headset MS)
3.7   Noise contrast      Up
3.8   Sensitivity/frequency characteristics      Up
3.9   Distortion (handset and headset MS)
3.10   Sidetone (handset and headset MS)   PDF-p. 26      Up
3.11   Out-of-band signals
3.12   Requirements for information tones      Up
3.13   Crosstalk
3.14   MS Ambient Noise Rejection   PDF-p. 28
A   Considerations on the Acoustic Interface of the Mobile Station   PDF-p. 37
B  (normative)   Test considerations   PDF-p. 38
C  (normative)   Transmission requirements testing   PDF-p. 44
C.1   Loudness ratings
C.2   Idle Channel Noise
C.3   Sensitivity/frequency characteristics
C.4   Distortion
C.5   Variation of gain with input level   PDF-p. 48      Up
C.6   Sidetone
C.7   Sidetone distortion   PDF-p. 49
C.8   Out-of-band signals
C.9   Acoustic echo loss   PDF-p. 50
C.10   Delay for handsfree MS   PDF-p. 51
C.11   Ambient noise rejection   PDF-p. 52
D  (normative)   MS delay requirement definition   PDF-p. 54
E   Adaptive gain control   PDF-p. 56
F   Change Request History   PDF-p. 57