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TS 43.050
Transmission Planning aspects
of the Speech Service
in the GSM PLMN System

3GPP‑Page   ETSI‑search   fToC↓   Partial Content →
V19.0.0 (PDF)  2025/09  43 p.
V18.0.0  2024/03  43 p.
V17.0.0  2022/03  43 p.
V16.0.0  2020/06  43 p.
V15.0.0  2018/06  40 p.
V14.0.0  2017/03  42 p.
V13.0.0  2015/12  42 p.
V12.0.0  2014/09  42 p.
V11.0.0  2012/09  42 p.
V10.0.0  2011/04  42 p.
V9.0.0  2009/12  42 p.
V8.0.0  2008/12  42 p.
V7.1.0  2008/03  42 p.
V6.0.0  2005/01  42 p.
V5.0.0  2001/04  42 p.
V4.0.0  2001/04  43 p.
GSM Rel-99 v8.1.1  2000/11  58 p.
GSM Rel-98 v7.1.1  2000/11  58 p.
GSM Rel-97 v6.2.1  2000/11  58 p.
GSM Rel-96 v5.4.0  2000/06  59 p.
GSM Phase-2 v4.6.1  1999/03  48 p.
GSM Phase-1 v3.4.0  1994/07  29 p.
Rapporteur:
Mr. Usai, Paolino
ETSI

full Table of Contents for  TS 43.050  Word version:  19.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content
Here   Top
1Scope  p. 7
1.1References  p. 7
1.2Abbreviations  p. 9
1.3Introduction  p. 10
2Network configurations  p. 10
2.1General  p. 10
2.2Model of the PLMN  p. 10
2.3Interfaces  p. 10
2.4Configurations of connections  p. 11
2.4.1General configurations of connections  p. 11
2.4.2Reference configurations to illustrate delay and echo control issues  p. 11
2.54-wire circuits in the PLMN  p. 12
3Transmission performance  p. 12
3.1Overall Loss/Loudness ratings  p. 13
3.1.1Connections with handset MSs  p. 13
3.1.2Connections with handsfree MSs  p. 13
3.1.3Connections with headset MSs  p. 13
3.2Stability Loss  p. 14
3.3Delay  p. 14
3.3.1General  p. 14
3.3.2Sources of delay  p. 14
3.3.2.1Elements of the PLMN that cause delay  p. 14
3.3.2.2Elements of the PSTN that cause delay  p. 14
3.3.3Effects of delay  p. 14
3.3.4Allocation of delay to the PLMN  p. 15
3.3.4.1Allocation of delay to the PLMN when using a full rate system  p. 15
3.3.4.2Allocation of delay to the PLMN when using a half rate system  p. 15
3.3.5Delay of various network configurations  p. 15
3.3.5.1National and international connections with no echo control in the PSTN (reference configurations A)  p. 15
3.3.5.2National and international connections with echo control in the PSTN (reference configurations B)  p. 15
3.3.5.3Connections where re-routeing leads to a significant increase in transmission path length (reference configurations C)  p. 16
3.3.6Delay related requirements on the MS  p. 16
3.3.6.1Full rate MS  p. 16
3.3.6.2Half rate MS  p. 16
3.3.6.3Handsfree MS  p. 16
3.4Echo  p. 16
3.4.1General  p. 16
3.4.2Electrical echo control in the PLMN (Reference configurations A)  p. 17
3.4.3Acoustic echo control in the PLMN  p. 17
3.4.4Interaction between tandem echo control devices (reference configurations B & C)  p. 17
3.5Clipping  p. 17
3.5.1General  p. 17
3.5.2Properties of voice switches in the PLMN  p. 18
3.5.3Problems of tandem voice switching  p. 18
3.6Idle channel noise (handset and headset MS)  p. 18
3.6.1Sending  p. 18
3.6.2Receiving  p. 18
3.7Noise contrast  p. 18
3.7.1General  p. 18
3.7.2Elements of a PLMN which can cause noise contrast impairment  p. 19
3.7.3Reduction of noise contrast  p. 19
3.7.3.1Reduction of noise contrast by limiting the noise received by the microphone  p. 19
3.7.3.1.1Headset MS  p. 19
3.7.3.1.2Handset MS  p. 19
3.7.3.1.3Handsfree MS  p. 20
3.7.3.2Reduction of noise contrast by insertion of comfort noise  p. 20
3.7.4Consequence of the introduction of high comfort noise levels on other voice-operated devices  p. 20
3.8Sensitivity/frequency characteristics  p. 20
3.8.1Headset and Handset MSs  p. 20
3.8.1.1Sending  p. 20
3.8.1.2Receiving  p. 20
3.8.2Handsfree MS  p. 21
3.8.2.1Sending  p. 21
3.8.2.2Receiving  p. 21
3.9Distortion (handset and headset MS)  p. 21
3.9.1Gain variation, sending  p. 21
3.9.2G ain variation, receiving  p. 21
3.10Sidetone (handset and headset MS)  p. 22
3.10.1Sidetone loss  p. 22
3.10.1.1LSTR  p. 22
3.10.1.2STMR  p. 22
3.10.2Sidetone distortion  p. 22
3.11Not used  p. 22
3.12Requirements for information tones  p. 22
3.13Crosstalk  p. 23
3.13.1Near and far end crosstalk  p. 23
3.13.2Go/return crosstalk  p. 23
3.14MS Ambient Noise Rejection  p. 23
AConsiderations on the Acoustic Interface of the Mobile Station  p. 32
A.1Handsfree MS  p. 32
A.2Handset MS  p. 32
A.3Headset MS  p. 32
A.4Inter-reaction with DTX  p. 32
B(Normative)  Test considerations  p. 33
C(Normative)  Transmission requirements testing  p. 34
C.1Not usedC.2 Not usedC.3 Not usedC.4 Not usedC.5 Variation of gain with input level  p. 34
C.5.1Sending  p. 34
C.5.2Receiving  p. 34
C.6Not used  p. 34
C.7Not used  p. 34
C.8Not used  p. 34
C.9Not used  p. 34
C.10Delay for handsfree MS  p. 34
C.10.1Uplink  p. 34
C.10.2Downlink  p. 35
C.10.3Result  p. 35
D(Normative)  MS delay requirement definition  p. 36
D.1Full rate MS delay requirement definition  p. 36
D.2Half rate MS delay requirement definition  p. 37
EAdaptive gain control  p. 38
$Change History  p. 39

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