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3GPP (SA4)
TS 06.21














Half rate speech – Substitution and muting of lost frames for half rate speech traffic channels

(P) GSM Rel-99 v8.0.1    2000/11    11 p.
(P) GSM Rel-98 v7.0.1    2000/01    11 p.
(P) GSM Rel-97 v6.0.1    1998/11    11 p.
(P) GSM Rel-96 v5.0.1    1996/11    11 p.
(P) GSM Phase-2 v4.0.2    1995/12    11 p.

Rapporteur:  AFTELAK, Steve
Descendant(s):  TS 46.021    

This TS defines a frame substitution and muting procedure which shall be used by the Receive (RX) Discontinuous Transmission (DTX) handler when one or more lost or unreliable speech or SIlence Descriptor (SID) frames are received from the Radio Sub System (RSS).

The requirements of this TS are mandatory for implementation in all GSM Base Station Systems (BSS)s and Mobile Stations (MS)s capable of supporting the half rate speech traffic channel.