Last update: January 14, 2010.
Each line is a link to the TS (or TR) description, which points to the "3GPP specification detail" page that gives access to MS Word versions (as zip files, possibly including associated files) as well as pdf versions.
This TS
contains the service description for the in-band signalling protocol for the support of Tandem
Free Operation of the Half Rate, Full Rate, Enhanced Full Rate, Adaptive Multi Rate narrowband and Adaptive Multi
Rate Wide-Band speech codec types in GSM and GSM-evolved 3G systems.